GB945494A - Improvements in or relating to methods of producing joints between carbon electrodes and joints produced by such methods - Google Patents
Improvements in or relating to methods of producing joints between carbon electrodes and joints produced by such methodsInfo
- Publication number
- GB945494A GB945494A GB15199/60A GB1519960A GB945494A GB 945494 A GB945494 A GB 945494A GB 15199/60 A GB15199/60 A GB 15199/60A GB 1519960 A GB1519960 A GB 1519960A GB 945494 A GB945494 A GB 945494A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrodes
- envelope
- cement
- nipple
- methods
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 title abstract 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title abstract 2
- 239000004568 cement Substances 0.000 abstract 4
- 210000002445 nipple Anatomy 0.000 abstract 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- 239000004033 plastic Substances 0.000 abstract 2
- 229920003023 plastic Polymers 0.000 abstract 2
- 239000004254 Ammonium phosphate Substances 0.000 abstract 1
- 239000001828 Gelatine Substances 0.000 abstract 1
- 235000015842 Hesperis Nutrition 0.000 abstract 1
- 235000012633 Iberis amara Nutrition 0.000 abstract 1
- 239000004698 Polyethylene Substances 0.000 abstract 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 abstract 1
- 235000019289 ammonium phosphates Nutrition 0.000 abstract 1
- SRSXLGNVWSONIS-UHFFFAOYSA-N benzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 238000003763 carbonization Methods 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000000571 coke Substances 0.000 abstract 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 abstract 1
- 239000011888 foil Substances 0.000 abstract 1
- 229920000159 gelatin Polymers 0.000 abstract 1
- 235000019322 gelatine Nutrition 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- -1 polyethylene Polymers 0.000 abstract 1
- 229920000573 polyethylene Polymers 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 229910021332 silicide Inorganic materials 0.000 abstract 1
- 239000011343 solid material Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 230000008961 swelling Effects 0.000 abstract 1
- UGNWTBMOAKPKBL-UHFFFAOYSA-N tetrachloro-1,4-benzoquinone Chemical compound ClC1=C(Cl)C(=O)C(Cl)=C(Cl)C1=O UGNWTBMOAKPKBL-UHFFFAOYSA-N 0.000 abstract 1
- 239000010936 titanium Substances 0.000 abstract 1
- 229910052719 titanium Inorganic materials 0.000 abstract 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/225—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of a settable material
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B7/00—Heating by electric discharge
- H05B7/02—Details
- H05B7/14—Arrangements or methods for connecting successive electrode sections
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S285/00—Pipe joints or couplings
- Y10S285/915—Mastic
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S403/00—Joints and connections
- Y10S403/05—Carbon electrode
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
- Y10S411/924—Coupled nut and bolt
- Y10S411/929—Thread lock
- Y10S411/93—Flowing metal or settable material
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49885—Assembling or joining with coating before or during assembling
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49947—Assembling or joining by applying separate fastener
- Y10T29/49963—Threaded fastener
- Y10T29/49964—At least one part nonmetallic
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49947—Assembling or joining by applying separate fastener
- Y10T29/49966—Assembling or joining by applying separate fastener with supplemental joining
- Y10T29/4997—At least one part nonmetallic
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/47—Molded joint
- Y10T403/472—Molded joint including mechanical interlock
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/55—Member ends joined by inserted section
- Y10T403/556—Section threaded to member
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Discharge Heating (AREA)
- Prevention Of Electric Corrosion (AREA)
- Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
- Coating Apparatus (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
Abstract
945,494. Furnace electrode joints. SIEMENS-PLANIAWERKE A.G. FUR KOHLEFABRIKATE. April 29, 1960 [April 30, 1959; Jan. 12, 1960], No. 15199/60. Heading H5H. [Also in Division C3] A method of coaxially joining two carbon electrodes 1, 2 by means of a cemented doubleconical nipple plug 4 in screwed engagement with respective rockets 3, 4 of the electrodes includes the steps of placing a given dosage of cement 8, 9 wrapped in a readily destroyable envelope into the socket space of the electrodes, subsequently joining the electrodes by screwing them together with the nipple plug, and finally subjecting the joint to conditions which are such as to destroy the envelope. The nipple 4 is provided with four longitudinal grooves 12, and the end faces of the electrodes have radial grooves 13, 14. The envelope may be of polyethylene foil or gelatine. The cement contains pitch, a synthetic plastic material, e.g. a resin, which thermally hardens prior to carbonization of the pitch, granular solid material, e.g. coke, graphite powder or silicides of titanium or iron, and a swelling agent, e.g. hydrazide of benzene-sulphonic acid or ammonium phosphate. The envelopes may be ruptured by screwing the electrodes tightly together and are then destroyed by thermal and/or chemical action. The carbon surfaces to be cemented are preferably pre-impregnated with a catalyzer, e.g. chloranil or phosphoric acid which attacks the envelope and promotes hardening of the cement. An insulating gasket of paper or synthetic plastic material may be provided between the end faces of the electrodes to force the current during the first few minutes of furnace operation to pass entirely through the nipple 4, thus causing a rapid heating of the cement. The gasket is at the same time carbonized and becomes conductive.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES62860A DE1290642B (en) | 1959-04-30 | 1959-04-30 | Nipple connection of carbon or graphite electrodes |
| DE1960S0070839 DE1440571A1 (en) | 1959-04-30 | 1960-01-12 | Connection between carbon-containing electrodes using a double-conical threaded nipple to be cemented |
| DES66606A DE1186959B (en) | 1959-04-30 | 1960-01-12 | Connection between carbon-containing electrodes using a double-conical threaded nipple to be cemented |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB945494A true GB945494A (en) | 1964-01-02 |
Family
ID=27212656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB15199/60A Expired GB945494A (en) | 1959-04-30 | 1960-04-29 | Improvements in or relating to methods of producing joints between carbon electrodes and joints produced by such methods |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3140967A (en) |
| AT (1) | AT244072B (en) |
| CH (1) | CH384103A (en) |
| DE (3) | DE1290642B (en) |
| FI (1) | FI40296B (en) |
| FR (1) | FR1255781A (en) |
| GB (1) | GB945494A (en) |
| NL (2) | NL132919C (en) |
| SE (1) | SE317147B (en) |
Families Citing this family (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3429759A (en) * | 1963-06-17 | 1969-02-25 | Union Carbide Corp | High temperature cement |
| US3405308A (en) * | 1966-05-12 | 1968-10-08 | Union Carbide Corp | Strengthened arc carbon electrode joints |
| US3472301A (en) * | 1967-10-18 | 1969-10-14 | Loctite Corp | Self-sealing mechanical fastener |
| US3517954A (en) * | 1967-10-23 | 1970-06-30 | Great Lakes Carbon Corp | Electrode section-connecting nipple pre-assembly and process of assembling an electrode joint |
| US3517957A (en) * | 1967-10-23 | 1970-06-30 | Great Lakes Carbon Corp | Nipple-electrode assembly and joint and method of making same |
| US3717911A (en) * | 1971-02-09 | 1973-02-27 | Great Lakes Carbon Corp | Method of making a nipple-electrode joint |
| US3814828A (en) * | 1971-02-09 | 1974-06-04 | Great Lakes Carbon Corp | Nipple-electrode assembly |
| US3884840A (en) * | 1972-04-27 | 1975-05-20 | British Steel Corp | Graphite-pitch electrode paste |
| DE2359937A1 (en) * | 1973-12-01 | 1975-06-19 | Maschf Augsburg Nuernberg Ag | DOSING AGENT FOR LIQUID OR DOUGH SCREW LOCKING AGENT |
| US4208149A (en) * | 1978-10-25 | 1980-06-17 | Airco, Inc. | Electrode connecting pin assembly |
| SE414660B (en) * | 1978-11-13 | 1980-08-11 | Braxell N | DEVICE FOR COATING PARTS |
| DE3418934A1 (en) * | 1984-05-22 | 1985-11-28 | Sigri GmbH, 8901 Meitingen | GRAPHITE ELECTRODE FOR ARC FURNACES AND METHOD FOR THEIR PRODUCTION |
| US4750761A (en) * | 1984-11-23 | 1988-06-14 | Watts John Dawson | Oilwell tubular connection |
| US4729689A (en) * | 1984-12-13 | 1988-03-08 | Union Carbide Corporation | Electrode member and process for the production thereof |
| US4712957A (en) * | 1985-12-11 | 1987-12-15 | Wayne Edwards | Adhesively secured fastener |
| US4725161A (en) * | 1986-09-05 | 1988-02-16 | Union Carbide Corporation | Electrode joint |
| FR2692748B1 (en) * | 1992-06-18 | 1998-07-17 | Savoie Electrodes Refract | ELECTRIC OVEN ELECTRODES CONNECTION GASKET. |
| DE29721200U1 (en) * | 1997-11-29 | 1998-01-22 | Bümach Engineering International B.V., Emmen | Sealing thread pairing |
| US6902366B2 (en) * | 2001-08-15 | 2005-06-07 | Ducker, Iii Andrew L. | Sealable fastener with circumferential sealant channel and sealant delivery groove for delivering sealant into the circumferential sealant channel |
| US7324576B2 (en) * | 2004-01-20 | 2008-01-29 | Graftech International Holdings Inc. | Joint strengthening ring for graphite electrodes |
| US7466739B2 (en) * | 2004-01-20 | 2008-12-16 | Graftech International Holdings Inc. | Locking ring for graphite electrodes |
| US20070280327A1 (en) * | 2004-01-20 | 2007-12-06 | Smith Robert E | Electrode joint |
| US20070047613A1 (en) * | 2004-01-20 | 2007-03-01 | Brian Bowman | Locking ring for graphite electrodes having friction layer |
| US20050175061A1 (en) * | 2004-01-20 | 2005-08-11 | Michael Frastaci | Locking ring for graphite electrodes |
| US7324577B2 (en) * | 2004-01-20 | 2008-01-29 | Graftech International Holdings Inc. | End-face seal for male-female electrode joints |
| US7230969B2 (en) * | 2004-06-03 | 2007-06-12 | Ucar Carbon Company Inc. | Electrode joint locking system |
| US20050175062A1 (en) * | 2004-01-20 | 2005-08-11 | Brian Bowman | End-face seal for graphite electrodes |
| DE102013216452B4 (en) | 2013-08-20 | 2016-12-01 | Sgl Carbon Se | Improved electrode / nipple connection |
| US10634473B2 (en) | 2014-01-29 | 2020-04-28 | Raytheon Company | Internally coupleable joint |
| DE202016005400U1 (en) | 2016-09-06 | 2016-11-11 | Sgl Carbon Se | Kittstift Containers for connections between electrodes |
| TWM580636U (en) * | 2018-11-16 | 2019-07-11 | 台灣耐落螺絲工業股份有限公司 | Fastener structure with integrated conductive and anti-loose/leak-proof |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1071249B (en) * | 1959-12-17 | Fa C Conradty, Nürnberg | Process for the introduction of self-hardening putty to secure the screw nipple connection in carbon or graphite electrodes for electric arc furnaces against loosening | |
| US1743888A (en) * | 1923-04-25 | 1930-01-14 | Nat Carbon Co Inc | Electrical connection |
| US2093390A (en) * | 1934-12-19 | 1937-09-14 | Union Carbide & Carbon Corp | Means and method of making electrode joints |
| US2421105A (en) * | 1944-03-15 | 1947-05-27 | Jr Richard F Warren | Lock nut |
| GB739013A (en) * | 1953-06-22 | 1955-10-26 | Jacob Rush Snyder | Improvements in or relating to metal-to-wood fastenings |
| US2510230A (en) * | 1949-01-15 | 1950-06-06 | Union Carbide & Carbon Corp | Electrode joint |
| US2684318A (en) * | 1950-04-03 | 1954-07-20 | Sam M Shobert | Method for fabricating glass rods |
| US2829502A (en) * | 1953-12-17 | 1958-04-08 | Joseph B Dempsey | Mine roof bolt installation |
| BE558765A (en) * | 1954-08-06 | 1900-01-01 | ||
| US2894776A (en) * | 1954-08-12 | 1959-07-14 | Union Carbide Corp | Electrode joint |
| US2836806A (en) * | 1955-06-02 | 1958-05-27 | Union Carbide Corp | Conductive pad for electrode joint |
| US2952129A (en) * | 1958-01-09 | 1960-09-13 | Joseph B Dempsey | Mine roof bolt installation |
| LU37186A1 (en) * | 1958-07-25 |
-
0
- NL NL250994D patent/NL250994A/xx unknown
- NL NL132919D patent/NL132919C/xx active
-
1959
- 1959-04-30 DE DES62860A patent/DE1290642B/en active Pending
-
1960
- 1960-01-12 DE DES66606A patent/DE1186959B/en active Pending
- 1960-01-12 DE DE1960S0070839 patent/DE1440571A1/en active Pending
- 1960-04-25 AT AT313060A patent/AT244072B/en active
- 1960-04-27 US US24965A patent/US3140967A/en not_active Expired - Lifetime
- 1960-04-27 CH CH474060A patent/CH384103A/en unknown
- 1960-04-28 FI FI0751/60A patent/FI40296B/fi active
- 1960-04-29 FR FR825811A patent/FR1255781A/en not_active Expired
- 1960-04-29 GB GB15199/60A patent/GB945494A/en not_active Expired
- 1960-04-30 SE SE4309/60A patent/SE317147B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SE317147B (en) | 1969-11-10 |
| DE1440571A1 (en) | 1968-11-07 |
| AT244072B (en) | 1965-12-10 |
| DE1186959B (en) | 1965-02-11 |
| CH384103A (en) | 1964-11-15 |
| NL132919C (en) | 1900-01-01 |
| FR1255781A (en) | 1961-03-10 |
| US3140967A (en) | 1964-07-14 |
| FI40296B (en) | 1968-09-02 |
| DE1290642B (en) | 1969-03-13 |
| NL250994A (en) | 1900-01-01 |
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