WO2002047102A2 - Electrodeless lamp - Google Patents
Electrodeless lamp Download PDFInfo
- Publication number
- WO2002047102A2 WO2002047102A2 PCT/US2001/046900 US0146900W WO0247102A2 WO 2002047102 A2 WO2002047102 A2 WO 2002047102A2 US 0146900 W US0146900 W US 0146900W WO 0247102 A2 WO0247102 A2 WO 0247102A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- preform
- aperture
- electrodeless lamp
- window
- ceramic
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
- H01J9/245—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps
- H01J9/247—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps specially adapted for gas-discharge lamps
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/111—Fine ceramics
- C04B35/115—Translucent or transparent products
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/14—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silica
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/302—Vessels; Containers characterised by the material of the vessel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
- H01J61/361—Seals between parts of vessel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
- H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
- H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
- H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/94—Products characterised by their shape
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Definitions
- the present invention relates to an electrodeless lamp, that is to say a hollow structure containing a material excitable by radio frequency energy to emit visible light.
- the object of the invention is to provide an electrodeless lamp body having a translucent window.
- a body for an electrodeless lamp comprising: • a body preform of sintered ceramic material, defining the shape of the body which is hollow; • an aperture in the preform for charging the excitable material into the hollow body; and
- the preform has a stepped recess at one end for receiving the window, which is accommodated in the stepped recess.
- the charging aperture may be sealed with a disc of sintered ceramic material fused to the body across the aperture.
- the body may be formed at the aperture with a collapsible lip, which seals the aperture on fusing of the lip.
- the ceramic material of the preform can be of alumina ceramic or quartz.
- the window can be of alumina ceramic, particularly artificial sapphire, or quartz.
- an electrodeless lamp having a body in accordance with the first aspect, with its charging aperture sealed and containing the excitable material.
- an electrodeless lamp consisting in the steps of:
- the excitable material is charged into the hollow body whilst the latter is still hot from the firing of the preform and the laser irradiation also is carried out whilst the hollow body is still hot.
- the lamp body is flushed with inert gas to cool it from its firing temperature and flush oxygen from it prior to injection of excitable material.
- the method preferably includes the evacuation of the lam body prior to injection of excitable material.
- Figure 1 is a cross-sectional view o f a first lamp of the invention, with a disc seal;
- Figure 2 is a similar view of a seco nd lamp, with a collapsible lip aperture prior to sealing;
- Figure 3 is a similar view of the second lamp after sealing; and Figure 4 is a process flow diagram for forming another lamp of the invention.
- the lamp 1 has a body 2 of sintered alumina ceramic material and an artificial sapphire window 3.
- the body 2 is initially moulded in green state and the window is pressed into a front recess 4.
- the combination is fired at a temperature of the order of 1500°C, to fuse the body into a coherent pressure-tight state with the window.
- a pellet of excitable material is added through a rear, charging aperture 5.
- a disc 6 of ceramic with frit 7 is placed over the aperture. The disc is irradiated by laser to fuse the frit and the disc to the body, thus sealing the excitable material into the lamp.
- the lamp 11 has a body 12 and window 13 formed and sealed together in essentially the same manner as in the first embodiment.
- the charging aperture 15 has a lip 21 around its orifice 22, the lip being defined by a groove 23. The lip is such that on charging of the excitable material into the body, and laser irradiation of the lip, the lip collapses into a fused closure 26 to close the aperture at its orifice entrapping the excitable material.
- the choice of the inert gas and the excitable material will be within the abilities of the man skilled in the art, as will be the choice of ceramic material.
- This can be of alumina ceramic or quartz.
- the window can be of alumina for example artificial sapphire or of quartz.
- the excitable material can be of indium bromide with argon or krypton or sulphur with krypton.
- FIG. 4 there is shown a process flow diagram for forming another lamp of the invention. It will be described in accordance with the steps shown in the Figure.
- a preform for the lamp body 102 is moulded from green ceramic material. It has a circular cylindrical side wall 1021, with an end wall 1022, having a central sealing lip 121 defining a charging aperture 115. Its other end has a rim 1023 surrounding a recess 104.
- Step 2 An artificial sapphire window 103 is pressed into the lamp body 102 at the recess 104.
- Step 3 The body and window are fired at 1500°C. This unifies the body and the window to it.
- Step 4. The body and window are inverted and robotically placed centrally on a turntable T within an open topped dish D.
- a laser L is arranged above the body and used to maintain the temperature of the body at 1500°C by irradiation.
- Step 5 A krypton injection needle N is inserted through the aperture 115 far enough for its end to be close to the window.
- the needle has a closed end with side ports.
- the krypton flushes oxygen from the body and flows into the dish D, where it is retained, whereby oxygen is displaced from the body.
- Step 6 Cooler krypton is now injected to cool the body to 400°C.
- the krypton needle is withdrawn and an indium bromide injection needle H3N is inserted into the body in its stead.
- the needle has a small, heated reservoir R of indium bromide with a piezoelectric crystal C in its side wall. Pulsing of the crystal forces a droplet of the molten indium bromide from the needle IBN into the body.
- Step 7 Immediately after injection, the needle is withdrawn and a vacuum shroud S is dropped over the body 102 to seal with the dish.
- the shroud is evacuated swiftly to remove any possible trace of oxygen.
- the shroud is refilled with krypton and the lamp body maintained at 400°C. This is by laser irradiation through a window W in the shroud.
- Step 8 The laser L is trepanned around the lip 121, which melts in against itself, thereby sealing the body, with the indium bromide sealed inside.
- an annular cold trap T is positioned between the window and the lamp body.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002227271A AU2002227271A1 (en) | 2000-12-06 | 2001-12-06 | Electrodeless lamp |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US25171200P | 2000-12-06 | 2000-12-06 | |
US60/251,712 | 2000-12-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002047102A2 true WO2002047102A2 (en) | 2002-06-13 |
Family
ID=22953082
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/046900 WO2002047102A2 (en) | 2000-12-06 | 2001-12-06 | Electrodeless lamp |
Country Status (3)
Country | Link |
---|---|
US (1) | US6856092B2 (en) |
AU (1) | AU2002227271A1 (en) |
WO (1) | WO2002047102A2 (en) |
Cited By (3)
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---|---|---|---|---|
WO2006070190A1 (en) * | 2004-12-27 | 2006-07-06 | Ceravision Limited | Electrodeless incandescent bulb |
US8092875B2 (en) | 2007-04-03 | 2012-01-10 | Ngk Insulators, Ltd. | Composite luminous vessels |
WO2011128443A3 (en) * | 2010-04-16 | 2012-02-23 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V. | Device for generating uv light, comprising a gas-filled plasma chamber |
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US6922021B2 (en) * | 2000-07-31 | 2005-07-26 | Luxim Corporation | Microwave energized plasma lamp with solid dielectric waveguide |
US6737809B2 (en) * | 2000-07-31 | 2004-05-18 | Luxim Corporation | Plasma lamp with dielectric waveguide |
US7429818B2 (en) * | 2000-07-31 | 2008-09-30 | Luxim Corporation | Plasma lamp with bulb and lamp chamber |
US7638951B2 (en) | 2005-10-27 | 2009-12-29 | Luxim Corporation | Plasma lamp with stable feedback amplification and method therefor |
US7791280B2 (en) * | 2005-10-27 | 2010-09-07 | Luxim Corporation | Plasma lamp using a shaped waveguide body |
US7994721B2 (en) * | 2005-10-27 | 2011-08-09 | Luxim Corporation | Plasma lamp and methods using a waveguide body and protruding bulb |
US8022607B2 (en) * | 2005-10-27 | 2011-09-20 | Luxim Corporation | Plasma lamp with small power coupling surface |
US7906910B2 (en) * | 2005-10-27 | 2011-03-15 | Luxim Corporation | Plasma lamp with conductive material positioned relative to RF feed |
US7701143B2 (en) * | 2005-10-27 | 2010-04-20 | Luxim Corporation | Plasma lamp with compact waveguide |
US7791278B2 (en) | 2005-10-27 | 2010-09-07 | Luxim Corporation | High brightness plasma lamp |
US7855511B2 (en) * | 2005-10-27 | 2010-12-21 | Luxim Corporation | Plasma lamp with phase control |
US7719195B2 (en) | 2006-01-04 | 2010-05-18 | Luxim Corporation | Plasma lamp with field-concentrating antenna |
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WO2008048600A2 (en) * | 2006-10-16 | 2008-04-24 | Luxim Corporation | Modulated light source systems and methods |
US20100253231A1 (en) * | 2006-10-16 | 2010-10-07 | Devincentis Marc | Electrodeless plasma lamp systems and methods |
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WO2008048968A2 (en) * | 2006-10-16 | 2008-04-24 | Luxim Corporation | Electrodeless plasma lamp and fill |
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US8143801B2 (en) * | 2006-10-20 | 2012-03-27 | Luxim Corporation | Electrodeless lamps and methods |
US20080211971A1 (en) * | 2007-01-08 | 2008-09-04 | Luxim Corporation | Color balancing systems and methods |
US8159136B2 (en) * | 2007-02-07 | 2012-04-17 | Luxim Corporation | Frequency tunable resonant cavity for use with an electrodeless plasma lamp |
US8084955B2 (en) * | 2007-07-23 | 2011-12-27 | Luxim Corporation | Systems and methods for improved startup and control of electrodeless plasma lamp using current feedback |
WO2009014709A1 (en) | 2007-07-23 | 2009-01-29 | Luxim Corporation | Reducing arcing in electrodeless lamps |
US8154376B2 (en) * | 2007-09-17 | 2012-04-10 | Littelfuse, Inc. | Fuses with slotted fuse bodies |
US20090167201A1 (en) * | 2007-11-07 | 2009-07-02 | Luxim Corporation. | Light source and methods for microscopy and endoscopy |
US8294368B2 (en) | 2008-06-25 | 2012-10-23 | Topanga Technologies, Inc. | Electrodeless lamps with grounded coupling elements |
US7830092B2 (en) | 2008-06-25 | 2010-11-09 | Topanga Technologies, Inc. | Electrodeless lamps with externally-grounded probes and improved bulb assemblies |
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US8304994B2 (en) * | 2008-10-09 | 2012-11-06 | Luxim Corporation | Light collection system for an electrodeless RF plasma lamp |
US20100123396A1 (en) * | 2008-10-09 | 2010-05-20 | Luxim Corporation | Replaceable lamp bodies for electrodeless plasma lamps |
US20100102724A1 (en) * | 2008-10-21 | 2010-04-29 | Luxim Corporation | Method of constructing ceramic body electrodeless lamps |
US20100165306A1 (en) * | 2008-12-31 | 2010-07-01 | Luxmi Corporation | Beam projection systems and methods |
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US8629616B2 (en) | 2011-01-11 | 2014-01-14 | Topanga Technologies, Inc. | Arc tube device and stem structure for electrodeless plasma lamp |
US9177779B1 (en) | 2009-06-15 | 2015-11-03 | Topanga Usa, Inc. | Low profile electrodeless lamps with an externally-grounded probe |
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KR101958783B1 (en) | 2012-12-18 | 2019-03-15 | 엘지전자 주식회사 | Plasma lighting device and manufacturing method thereof |
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US9099291B2 (en) | 2013-06-03 | 2015-08-04 | Topanga Usa, Inc. | Impedance tuning of an electrode-less plasma lamp |
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US9230771B2 (en) * | 2014-05-05 | 2016-01-05 | Rayotek Scientific, Inc. | Method of manufacturing an electrodeless lamp envelope |
US9392752B2 (en) | 2014-05-13 | 2016-07-19 | Topanga Usa, Inc. | Plasma growth lamp for horticulture |
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US3942058A (en) | 1975-04-21 | 1976-03-02 | Gte Laboratories Incorporated | Electrodeless light source having improved arc shaping capability |
US4010400A (en) | 1975-08-13 | 1977-03-01 | Hollister Donald D | Light generation by an electrodeless fluorescent lamp |
NL7711134A (en) | 1976-10-19 | 1978-04-21 | Gen Electric Co Ltd | ELECTRIC HIGH PRESSURE DISCHARGE LAMP. |
NL7901897A (en) | 1979-03-09 | 1980-09-11 | Philips Nv | ELECTRESSLESS GAS DISCHARGE LAMP. |
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US4383203A (en) | 1981-06-29 | 1983-05-10 | Litek International Inc. | Circuit means for efficiently driving an electrodeless discharge lamp |
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US4927217A (en) * | 1987-06-26 | 1990-05-22 | U.S. Philips Corp. | Electrodeless low-pressure discharge lamp |
US5438235A (en) * | 1993-10-05 | 1995-08-01 | General Electric Company | Electrostatic shield to reduce wall damage in an electrodeless high intensity discharge lamp |
JPH07302578A (en) * | 1994-03-11 | 1995-11-14 | Toshiba Lighting & Technol Corp | Electrodeless discharge lamp, electrodeless discharge lamp device, electrodeless discharge lamp lighting device and electrodeless discharge light |
US5621275A (en) | 1995-08-01 | 1997-04-15 | Osram Sylvania Inc. | Arc tube for electrodeless lamp |
US5592048A (en) * | 1995-08-18 | 1997-01-07 | Osram Sylvania Inc. | Arc tube electrodeless high pressure sodium lamp |
EP0786798B1 (en) * | 1996-01-24 | 2002-04-24 | Matsushita Electric Industrial Co., Ltd. | Microwave electrodeless discharge lamp and the manufacturing method thereof |
US6137237A (en) * | 1998-01-13 | 2000-10-24 | Fusion Lighting, Inc. | High frequency inductive lamp and power oscillator |
-
2001
- 2001-12-06 US US10/007,652 patent/US6856092B2/en not_active Expired - Lifetime
- 2001-12-06 WO PCT/US2001/046900 patent/WO2002047102A2/en active Search and Examination
- 2001-12-06 AU AU2002227271A patent/AU2002227271A1/en not_active Abandoned
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006070190A1 (en) * | 2004-12-27 | 2006-07-06 | Ceravision Limited | Electrodeless incandescent bulb |
US8241082B2 (en) | 2004-12-27 | 2012-08-14 | Ceravision Limited | Electrode-less incandescent bulb |
TWI397102B (en) * | 2004-12-27 | 2013-05-21 | Ceravision Ltd | Method of making electrodeless incandescent bulb |
US8092875B2 (en) | 2007-04-03 | 2012-01-10 | Ngk Insulators, Ltd. | Composite luminous vessels |
WO2011128443A3 (en) * | 2010-04-16 | 2012-02-23 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V. | Device for generating uv light, comprising a gas-filled plasma chamber |
Also Published As
Publication number | Publication date |
---|---|
AU2002227271A1 (en) | 2002-06-18 |
US20020105274A1 (en) | 2002-08-08 |
US6856092B2 (en) | 2005-02-15 |
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