EP3966359A1 - Verfahren und vorrichtung zum spülen einer überlaufkammer an dem badseitigen ende eines rüssels einer vorrichtung zum schmelztauchbeschichten - Google Patents
Verfahren und vorrichtung zum spülen einer überlaufkammer an dem badseitigen ende eines rüssels einer vorrichtung zum schmelztauchbeschichtenInfo
- Publication number
- EP3966359A1 EP3966359A1 EP19750072.1A EP19750072A EP3966359A1 EP 3966359 A1 EP3966359 A1 EP 3966359A1 EP 19750072 A EP19750072 A EP 19750072A EP 3966359 A1 EP3966359 A1 EP 3966359A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- overflow chamber
- melt
- trunk
- overflow
- metal
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0032—Apparatus specially adapted for batch coating of substrate
- C23C2/00322—Details of mechanisms for immersing or removing substrate from molten liquid bath, e.g. basket or lifting mechanism
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0034—Details related to elements immersed in bath
- C23C2/00342—Moving elements, e.g. pumps or mixers
- C23C2/00344—Means for moving substrates, e.g. immersed rollers or immersed bearings
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
- C23C2/004—Snouts
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/325—Processes or devices for cleaning the bath
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/50—Controlling or regulating the coating processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
- B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
- B05C3/12—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length
- B05C3/125—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length the work being a web, band, strip or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2209/00—Details of machines or methods for cleaning hollow articles
- B08B2209/08—Details of machines or methods for cleaning containers, e.g. tanks
Definitions
- the invention relates to a method for flushing an overflow chamber at the bath-side end of a trunk of a device for hot-dip coating a metal strip with a molten metal.
- the invention relates to said device for hot-dip coating with the necessary components for carrying out the method.
- European patent EP 2 989 226 B1 discloses a device for the continuous hot-dip coating of metal strip.
- This device comprises a container with a molten metal for passing the metal strip through and a trunk for passing the metal strip through in a protective gas atmosphere after it has emerged from the molten metal.
- the trunk At its end on the bath side, the trunk has at least one overflow chamber for receiving impurities from the surface of the molten metal in the vicinity of the freshly coated metal strip.
- the device also has a lifting device for moving the trunk out of the molten metal and / or for lowering the trunk into the molten metal.
- the device has a suction pump for preferably continuously sucking off the impurities from the overflow chamber.
- the overflow chamber also has at least one passage opening, also called a flushing opening, through which liquid metal melt can flow from the molten bath into the drainage chamber, which is then continuously sucked out of the overflow chamber with the aid of a suction pump.
- a flushing opening By maintaining the flushing flow within the overflow chamber, it is reliably ensured that slag or impurities are continuously removed from the trunk, since the constant supply of liquid metal melt maintains a "soft" consistency of the slag and prevents deposits, so-called caking, largely in the trunk be avoided. Without a sufficient supply of liquid metal melt, slag particles floating in the trunk on the surface of the melt pool would combine with one another in a manner of sintering.
- the trunk disclosed in EP 2 989 226 B1 can be pivoted and telescoped without disturbing the removal of slag.
- the device disclosed in said patent specification has a control or regulating device for controlling the suction pump as a function of the height difference between the bath level and an overflow edge of the overflow chamber.
- the flushing process as it is known from said prior art, has the disadvantage that it can only be operated when the trunk with its overflow chamber is immersed in the molten metal.
- the invention is based on the object of developing a method according to the invention for flushing an overflow chamber and a device for hot-dip coating a metal strip for performing the method according to the invention in such a way that the flushing process continues even after the trunk has been pulled out of the melt can.
- the method provides that the trunk with the overflow chamber is moved out of the molten bath at least so far that no melt can flow over an overflow edge inside the trunk into the overflow chamber and that the rinsing circuit is operated even when the trunk is moved out of the melt Feeding the melt from the melt pool into the overflow chamber with the aid of a feed pump.
- the method according to the invention offers the advantage that the flushing process of the overflow chambers does not have to be interrupted, but can be continuously maintained until the overflow nozzle is immersed again in the melt.
- the continuous continuation of the rinsing process of the overflow chambers outside of the melt offers the advantage that the chambers can also be cleaned further in this situation in order to e.g. B. to prevent caking and that the suction pump is prevented from running dry
- the method according to the invention also provides that the level of the melt in the overflow chamber is regulated to a predetermined target level even when the trunk is extended from the melt by suitable variation of the power of the suction pump and / or the feed pump.
- the figure shows the device 100 for hot-dip coating a metal strip 200 with a metal melt 120.
- the metal melt 120 is located in a container 110.
- the metal strip 200 is moved over a deflection roller 115 deflected inside the container in the molten metal.
- the trunk 130 Before it enters the molten metal 120, it is passed through a trunk 130, the trunk ensuring that the metal strip is guided under a protective gas atmosphere before it enters the melt 120.
- the trunk 130 has at least one, preferably two or four overflow chambers 132 connected to one another in a fluid-conducting manner. These overflow chambers are used to take up slag residues or impurities from the surface of the metal melt in the vicinity of the metal strip.
- a suction pump 150 is provided for the preferably continuous suction of the impurities from the overflow chamber; This prevents these slag residues or impurities from coming into contact with the freshly coated metal strip and sticking there or on the inside of the trunk.
- a lifting device 140 is provided in the trunk 130 for moving the trunk 130 out of the molten metal and for lowering the trunk into the molten metal; the directions of travel for the trunk 130 are marked with a double arrow in the figure.
- the device 100 in addition to that of the suction pump 150, also has a feed pump 160 for feeding melt, preferably from the container 110 into the at least one overflow chamber 132, in particular also when the bath-side end of the trunk is no longer immersed in the molten metal 120 . Due to the preferably simultaneous operation of the feed pump 160 and the suction pump 150, it is possible according to the invention to maintain continuous flushing in the overflow chamber 132 in the form of a continuous flow of melt and in this way ensure continuous cleaning of the overflow chamber, even when the trunk has moved out of the melt and to prevent the suction pump from running dry.
- the trunk according to the invention is not only designed to be raised and lowered, but also pivotable. This applies in particular to the end piece on the bathroom side Trunk with the overflow chamber 132; however, other elements of the trunk can also be designed to be pivotable.
- the molten metal is, for example, liquid zinc.
- the device 100 according to the invention can also have a level control 170 for regulating the level of the melt 120 in the overflow chamber 132 even when the trunk 130 is moved out of the melt 120.
- the control is designed to adjust the level of the melt in the overflow chamber 132 to a predetermined target value.
- the target level of the melt in the overflow chamber is below an overflow edge 134 of the overflow chamber 132.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019206609.7A DE102019206609A1 (de) | 2019-05-08 | 2019-05-08 | Verfahren und Vorrichtung zum Spülen einer Überlaufkammer an dem badseitigen Ende eines Rüssels einer Vorrichtung zum Schmelztauchbeschichten |
| PCT/EP2019/069811 WO2020224792A1 (de) | 2019-05-08 | 2019-07-23 | Verfahren und vorrichtung zum spülen einer überlaufkammer an dem badseitigen ende eines rüssels einer vorrichtung zum schmelztauchbeschichten |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3966359A1 true EP3966359A1 (de) | 2022-03-16 |
| EP3966359B1 EP3966359B1 (de) | 2023-03-29 |
Family
ID=72943013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19750072.1A Active EP3966359B1 (de) | 2019-05-08 | 2019-07-23 | Verfahren und vorrichtung zum spülen einer überlaufkammer an dem badseitigen ende eines rüssels einer vorrichtung zum schmelztauchbeschichten |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US11850634B2 (de) |
| EP (1) | EP3966359B1 (de) |
| KR (1) | KR20220002629A (de) |
| CN (1) | CN113966407B (de) |
| DE (1) | DE102019206609A1 (de) |
| PL (1) | PL3966359T3 (de) |
| WO (1) | WO2020224792A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021048593A1 (en) * | 2019-09-10 | 2021-03-18 | Arcelormittal | Moveable overflow for continuous hot-dip coating equipments |
| CN113637934B (zh) * | 2021-07-22 | 2023-06-27 | 武汉钢铁有限公司 | 一种用于环形溢流炉鼻子制造的辅助装置及方法 |
| CN114807802B (zh) * | 2022-04-24 | 2023-04-07 | 苏州市华盛源机电有限公司 | 基于合金镀液的大功率电机壳表面高效加工装置及方法 |
| CN117431485A (zh) * | 2022-07-12 | 2024-01-23 | 宝山钢铁股份有限公司 | 多工作模式的热镀锌组炉鼻子机组及其内部气氛控制方法 |
| CN118600352B (zh) * | 2024-08-08 | 2025-01-03 | 中南大学 | 锌液面电磁驱渣装置及方法 |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61103587A (ja) * | 1984-10-26 | 1986-05-22 | Osaka Gas Co Ltd | 埋設パイプの内面用ライニング方法 |
| JP2501654B2 (ja) | 1990-06-28 | 1996-05-29 | 川崎製鉄株式会社 | 連続溶融亜鉛めっき装置 |
| JPH04120258A (ja) * | 1990-09-12 | 1992-04-21 | Kawasaki Steel Corp | 連続溶融亜鉛めっき方法および装置 |
| JPH04120258U (ja) | 1991-04-15 | 1992-10-27 | 三菱重工業株式会社 | 直流高圧放電電極 |
| JPH08269659A (ja) * | 1995-03-31 | 1996-10-15 | Nisshin Steel Co Ltd | 連続溶融めっきにおけるスナウト内ドロスの除去方法および装置 |
| RS50049B (sr) | 2000-11-10 | 2008-11-28 | Sollac, | Uređaj oblaganja sa namakanjem metalne trake |
| FR2816640B1 (fr) | 2000-11-10 | 2003-10-31 | Lorraine Laminage | Installation de revetement au trempe a chaud et en continu d'une bande metallique |
| JP2002275608A (ja) * | 2001-03-13 | 2002-09-25 | Nippon Steel Corp | 連続焼鈍材と溶融メッキ材の通板切替え方法 |
| JP2003293107A (ja) * | 2002-04-04 | 2003-10-15 | Nippon Steel Corp | 外観性に優れた溶融金属めっき方法およびその装置 |
| JP5609664B2 (ja) | 2011-01-18 | 2014-10-22 | Jfeスチール株式会社 | スナウト内の異物除去装置およびその異物除去方法 |
| KR20130062525A (ko) | 2011-12-05 | 2013-06-13 | 주식회사 포스코 | 도금액 유지 장치 |
| CN102925839A (zh) * | 2012-10-25 | 2013-02-13 | 常州大学 | 一种连续热浸镀锌铝中高频调幅磁场离心分离锌渣的方法 |
| DE102013104267B3 (de) | 2013-04-26 | 2014-02-27 | Thyssenkrupp Steel Europe Ag | Vorrichtung zum kontinuierlichen Schmelztauchbeschichten von Metallband |
| DE102014104509A1 (de) * | 2014-03-31 | 2015-10-01 | Thyssenkrupp Ag | Vorrichtung und Verfahren zur Reinigung einer Schmelze und Schmelztauchbeschichtungsanlage |
| DE102016218947A1 (de) * | 2016-04-28 | 2017-11-02 | Sms Group Gmbh | Bauteil für eine Schmelztauchbeschichtungsanlage und Verfahren zum Herstellen eines solchen |
| CN107447174A (zh) | 2016-05-31 | 2017-12-08 | 宝钢新日铁汽车板有限公司 | 一种炉鼻子内的清洁系统和方法 |
| CN108842121A (zh) * | 2018-08-25 | 2018-11-20 | 宝钢湛江钢铁有限公司 | 一种带钢连续热浸镀锌系统 |
-
2019
- 2019-05-08 DE DE102019206609.7A patent/DE102019206609A1/de not_active Withdrawn
- 2019-07-23 US US17/609,697 patent/US11850634B2/en active Active
- 2019-07-23 CN CN201980096150.8A patent/CN113966407B/zh active Active
- 2019-07-23 EP EP19750072.1A patent/EP3966359B1/de active Active
- 2019-07-23 PL PL19750072.1T patent/PL3966359T3/pl unknown
- 2019-07-23 WO PCT/EP2019/069811 patent/WO2020224792A1/de not_active Ceased
- 2019-07-23 KR KR1020217039255A patent/KR20220002629A/ko not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| PL3966359T3 (pl) | 2023-07-24 |
| US20220213582A1 (en) | 2022-07-07 |
| KR20220002629A (ko) | 2022-01-06 |
| US11850634B2 (en) | 2023-12-26 |
| DE102019206609A1 (de) | 2020-11-12 |
| WO2020224792A1 (de) | 2020-11-12 |
| EP3966359B1 (de) | 2023-03-29 |
| CN113966407A (zh) | 2022-01-21 |
| CN113966407B (zh) | 2023-10-27 |
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