CN113764130B - Environment-friendly cable for solar photovoltaic system - Google Patents
Environment-friendly cable for solar photovoltaic system Download PDFInfo
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- CN113764130B CN113764130B CN202111039558.7A CN202111039558A CN113764130B CN 113764130 B CN113764130 B CN 113764130B CN 202111039558 A CN202111039558 A CN 202111039558A CN 113764130 B CN113764130 B CN 113764130B
- Authority
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- China
- Prior art keywords
- inner cavity
- insulating layer
- homogenizing
- annular ring
- cable
- 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.)
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000004020 conductor Substances 0.000 claims abstract description 22
- 229910052802 copper Inorganic materials 0.000 claims abstract description 22
- 239000010949 copper Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000001125 extrusion Methods 0.000 claims description 15
- 239000002994 raw material Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 3
- 239000003063 flame retardant Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 229920000098 polyolefin Polymers 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 2
- 238000002360 preparation method Methods 0.000 claims 1
- 239000006185 dispersion Substances 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000005253 cladding Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Processes Specially Adapted For Manufacturing Cables (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses an environment-friendly cable for a solar photovoltaic system, which comprises a tinned copper conductor, an insulating layer and a sheath layer, wherein the insulating layer is coated on the surface of the tinned copper conductor, and the sheath layer is coated on the surface of the insulating layer. This solar photovoltaic system is with environmental protection type cable, when extruding processing, shake through annular circle and pass through the transmission pole and transmit the homogeneity vibrations piece, the homogeneity vibrations piece drives and connects the elastic band vibrations, shakes the raw and other materials of insulating layer evenly then extrudees at the surface of tinned copper conductor, can prevent effectively that the cable inside of extruding from producing the bubble, and the cable tensile ability that the raw and other materials dispersion produced more evenly is strong.
Description
Technical Field
The invention relates to the technical field of cables, in particular to an environment-friendly cable for a solar photovoltaic system.
Background
The cable is an electric energy or signal transmission device, and is usually composed of several wires or groups of wires, and the cable is a power cable, a control cable, a compensation cable, a shielding cable, a high-temperature cable, a computer cable, a signal cable, a coaxial cable, a fire-resistant cable, a marine cable, a mining cable, an aluminum alloy cable and the like. They are composed of single or multi-strand wires and insulating layers for connecting circuits, appliances, etc.
In the solar photovoltaic system, the environment-friendly cable has wide application, but after the production of the existing environment-friendly cable is finished, bubbles are easily generated in the cable, so that the tensile strength of the cable is reduced, and the cable cannot be suitable for a high-strength working environment.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an environment-friendly cable for a solar photovoltaic system, which solves the problems that after the production of the cable is finished, bubbles are easy to generate in the cable, the tensile strength of the cable is reduced, and the cable cannot be suitable for a high-strength working environment.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the environment-friendly cable for the solar photovoltaic system comprises a tinned copper conductor, an insulating layer and a sheath layer, wherein the insulating layer is coated on the surface of the tinned copper conductor, and the sheath layer is coated on the surface of the insulating layer;
the extrusion method of the cable comprises the following steps:
firstly, enabling a tin-plated copper conductor to pass through a mold core, melting raw materials of an insulating layer, and then adding the melted raw materials into an extrusion groove between a mold sleeve and the mold core;
step two, extruding the insulating layer on the surface of the tin-plated copper conductor, homogenizing, starting a vibrating motor of a vibrating mechanism to drive an annular ring to vibrate, transmitting the annular ring vibration to a homogenizing vibrating block through a conductive rod, driving a connecting elastic belt to vibrate by the homogenizing vibrating block, vibrating the raw material of the insulating layer uniformly and extruding the raw material on the surface of the tin-plated copper conductor;
and step three, repeating the step two, and extruding the sheath layer on the surface of the insulating layer.
As a further scheme of the invention: the homogenizing treatment in the second step comprises the following specific steps: the vibration motor of the vibration mechanism is started to drive the annular ring to vibrate, the annular ring vibration is transmitted to the homogenizing vibration block through the conductive rod, the homogenizing vibration block drives the connecting elastic belt to vibrate, and raw materials of the insulating layer vibrate uniformly and then are extruded on the surface of the tin-plated copper conductor.
As a further scheme of the invention: and in the second step, the homogenizing vibration block is arranged in the inner cavity of the die sleeve and is not contacted with the inner surface of the die sleeve.
As a further scheme of the invention: the connecting elastic band forms a sealing structure between the homogenizing vibration block and the die sleeve.
As a further scheme of the invention: the surface of the conductive rod is not contacted with the inner cavity of the die sleeve.
As a further scheme of the invention: the insulating layer and the sheath layer are made of halogen-free low-smoke flame-retardant polyolefin materials.
The extrusion equipment comprises a mold core, a mold sleeve and a vibration motor, wherein the mold sleeve is arranged on the surface of the mold core, a hollow groove is formed in the inner cavity of the mold sleeve, a homogenizing vibration block is movably connected with the inner cavity of the hollow groove, an elastic belt is connected with the surface of the homogenizing vibration block in a fixedly connected mode, one side of the elastic belt is fixedly connected with the inner cavity of the mold sleeve, an annular ring is sleeved on the surface of the mold sleeve, the output shaft end of the vibration motor is fixedly connected with the surface of the annular ring, one side of the annular ring is fixedly connected with a conducting rod, one end of the conducting rod penetrates through and extends to the inner cavity of the mold core, the inner cavity of the mold core is not in contact with the surface of the conducting rod, one end of the conducting rod is fixedly connected with the surface of the homogenizing vibration block, the conducting rods are provided with a plurality of the inner cavities of the annular ring, and extrusion grooves are partitioned between the mold core and the mold sleeve.
Compared with the prior art, the invention has the following beneficial effects:
(1) When extruding the processing, transmit the homogeneity vibrations piece through the conducting rod through annular circle vibrations, the homogeneity vibrations piece drives and connects the elastic ribbon vibrations, shakes the raw and other materials of insulating layer evenly then extrude on the surface of tinned copper conductor, can prevent effectively that the cable inside of extruding from producing the bubble, and the cable tensile ability that the raw and other materials dispersion produced more evenly is strong.
(2) By connecting the elastic bands, not only can a good sealing structure be formed, but also vibration can be prevented from being transmitted to the surface of the die sleeve, and the situation that the extruded product is deformed due to the vibration of the die sleeve can be caused.
Drawings
FIG. 1 is a schematic view of the cable of the present invention;
FIG. 2 is a schematic diagram of the structural connection of the extrusion apparatus of the present invention;
FIG. 3 is an enlarged view of a portion of the invention at A in FIG. 2;
fig. 4 is a side view of the structure of the homogeneous vibration mass of the present invention.
In the figure: 1. a tin-plated copper conductor; 2. an insulating layer; 3. a sheath layer; 11. a mold core; 12. a die sleeve; 13. a vibration motor; 14. a hollow groove; 15. homogenizing the vibration block; 16. connecting an elastic belt; 17. an annular ring; 18. and a conductive rod.
Detailed Description
In order to further describe the technical means and effects adopted by the present invention for achieving the intended purpose, the following detailed description will refer to the specific implementation, structure, characteristics and effects according to the present invention with reference to the accompanying drawings and preferred embodiments.
Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides an environment-friendly cable for solar photovoltaic system, including tinned copper conductor 1, insulating layer 2 and restrictive coating 3, insulating layer 2 cladding is on tinned copper conductor 1's surface, restrictive coating 3 cladding is on insulating layer 2's surface, through annular circle 17 vibrations through the transmission pole 18 transfer to homogeneity vibrations piece 15, homogeneity vibrations piece 15 drive connect elastic ribbon 16 vibrations, shake the raw and other materials of insulating layer 2 evenly then extrude on tinned copper conductor 1's surface, can prevent effectively that the cable of extruding from producing the bubble inside, the cable tensile ability that the raw and other materials dispersion produced more evenly is strong;
the extrusion method of the cable comprises the following steps:
firstly, enabling a tin-plated copper conductor 1 to pass through a mold core 11, melting raw materials of an insulating layer 2, and then adding the melted raw materials into an extrusion groove between a mold sleeve 12 and the mold core 11;
step two, extruding the insulating layer 2 on the surface of the tin-plated copper conductor 1, and homogenizing during extrusion;
and step three, repeating the step two, and extruding the sheath layer 3 on the surface of the insulating layer 2.
The homogenization treatment in the second step comprises the following specific steps: the vibration motor 13 of the vibration mechanism is started to drive the annular ring 17 to vibrate, the vibration of the annular ring 17 is transmitted to the homogenizing vibration block 15 through the conductive rod 18, the homogenizing vibration block 15 drives the connecting elastic belt 16 to vibrate, and the raw material of the insulating layer 2 is uniformly vibrated and then extruded on the surface of the tin-plated copper conductor 1.
The homogenizing vibration block 15 in the second step is arranged in the inner cavity of the die sleeve 12 and is not contacted with the inner surface of the die sleeve 12.
The connecting elastic band 16 forms a sealing structure between the homogenizing vibration block 15 and the die sleeve 12.
The surface of the conductive rod 18 is not in contact with the cavity of the die sleeve 12.
The insulating layer 2 and the sheath layer 3 are made of halogen-free low-smoke flame-retardant polyolefin materials.
The extrusion equipment comprises a mold core 11, a mold sleeve 12 and a vibration motor 13, wherein the mold sleeve 12 is sleeved on the surface of the mold core 11, a hollow groove 14 is formed in the inner cavity of the mold sleeve 12, a homogenizing vibration block 15 is movably connected to the inner cavity of the hollow groove 14, a connecting elastic belt 16 is fixedly connected to the surface of the homogenizing vibration block 15, one side of the connecting elastic belt 16 is fixedly connected with the inner cavity of the mold sleeve 12, an annular ring 17 is sleeved on the surface of the mold sleeve 12, the output shaft end of the vibration motor 13 is fixedly connected with the surface of the annular ring 17, one side of the annular ring 17 is fixedly connected with a conducting rod 18, one end of the conducting rod 18 penetrates through and extends to the inner cavity of the mold core 11, the inner cavity of the mold core 11 is not contacted with the surface of the conducting rod 18, one end of the conducting rod 18 is fixedly connected with the surface of the homogenizing vibration block 15, the conducting rods 18 are arranged in a plurality, the inner cavities of the annular ring 17 are uniformly distributed, and extrusion grooves are partitioned between the mold core 11 and the mold sleeve 12.
The present invention is not limited to the above embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present invention.
Claims (3)
1. The preparation method of the environment-friendly cable for the solar photovoltaic system is characterized by comprising the following steps of: the cable comprises a tin-plated copper conductor (1), an insulating layer (2) and a sheath layer (3), wherein the insulating layer (2) is coated on the surface of the tin-plated copper conductor (1), and the sheath layer (3) is coated on the surface of the insulating layer (2);
the extrusion method of the cable comprises the following steps:
firstly, enabling a tin-plated copper conductor (1) to pass through a mold core (11), melting raw materials of an insulating layer (2), and then adding the melted raw materials into an extrusion groove between a mold sleeve (12) and the mold core (11);
extruding an insulating layer (2) on the surface of the tin-plated copper conductor (1), and homogenizing during extrusion;
step three, repeating the step two, and extruding the sheath layer (3) on the surface of the insulating layer (2);
the homogenizing treatment in the second step comprises the following specific steps: starting a vibration motor (13), driving an annular ring (17) to vibrate, transmitting the vibration of the annular ring (17) to a homogenizing vibration block (15) through a conductive rod (18), driving a connecting elastic belt (16) to vibrate by the homogenizing vibration block (15), vibrating the raw material of the insulating layer (2) uniformly and extruding the raw material on the surface of the tin-plated copper conductor (1);
the homogenizing vibration block (15) in the second step is arranged in the inner cavity of the die sleeve (12) and is not contacted with the inner surface of the die sleeve (12);
the connecting elastic belt (16) forms a sealing structure between the homogenizing vibration block (15) and the die sleeve (12);
the extrusion equipment used in the extrusion method comprises a mold core (11), a mold sleeve (12) and a vibration motor (13), wherein the mold sleeve (12) is sleeved on the surface of the mold core (11), a hollow groove (14) is formed in the inner cavity of the mold sleeve (12), a homogenizing vibration block (15) is movably connected to the inner cavity of the hollow groove (14), an elastic connecting belt (16) is fixedly connected to the surface of the homogenizing vibration block (15), one side of the elastic connecting belt (16) is fixedly connected with the inner cavity of the mold sleeve (12), an annular ring (17) is sleeved on the surface of the mold sleeve (12), the output shaft end of the vibration motor (13) is fixedly connected with the surface of the annular ring (17), one side of the annular ring (17) is fixedly connected with a conducting rod (18), one end of the conducting rod (18) penetrates through and extends to the inner cavity of the mold core (11), the inner cavity of the mold core (11) is not contacted with the surface of the conducting rod (18), one end of the conducting rod (18) is fixedly connected with the surface of the homogenizing vibration block (15), the conducting rod (18) is provided with a plurality of the inner cavities, the inner cavities of the annular ring (17) are uniformly distributed, the inner cavities of the annular ring (17) and the annular ring (17) are fixedly connected with the inner cavity of the mold core, the inner cavity is fixedly connected with the inner cavity, and the annular ring (12) and the inner cavity is extended to the inner cavity of the inner cavity and the inner cavity of the cavity.
2. The method for preparing the environment-friendly cable for the solar photovoltaic system, which is characterized by comprising the following steps of: the surface of the conductive rod (18) is not in contact with the cavity of the die sleeve (12).
3. The method for preparing the environment-friendly cable for the solar photovoltaic system, which is characterized by comprising the following steps of: the insulating layer (2) and the sheath layer (3) are made of halogen-free low-smoke flame-retardant polyolefin materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111039558.7A CN113764130B (en) | 2021-09-06 | 2021-09-06 | Environment-friendly cable for solar photovoltaic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111039558.7A CN113764130B (en) | 2021-09-06 | 2021-09-06 | Environment-friendly cable for solar photovoltaic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113764130A CN113764130A (en) | 2021-12-07 |
| CN113764130B true CN113764130B (en) | 2023-12-19 |
Family
ID=78793287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111039558.7A Active CN113764130B (en) | 2021-09-06 | 2021-09-06 | Environment-friendly cable for solar photovoltaic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113764130B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB844199A (en) * | 1957-03-07 | 1960-08-10 | Standard Telephones Cables Ltd | Extrusion apparatus |
| GB1440933A (en) * | 1972-11-21 | 1976-06-30 | Bicc Ltd | Electromagnetic waveguides |
| JPH0647735A (en) * | 1992-07-30 | 1994-02-22 | Hitachi Cable Ltd | Guide cylinder of pellet cooling apparatus |
| CN102254597A (en) * | 2011-04-25 | 2011-11-23 | 江苏天地龙电缆有限公司 | Photovoltaic cable and manufacture method thereof |
| CN103419349A (en) * | 2013-07-30 | 2013-12-04 | 四川大学 | Polymer melt shear vibration extrusion molding device |
| CN105235175A (en) * | 2015-11-18 | 2016-01-13 | 李水清 | Efficient screw extruder |
| CN106409438A (en) * | 2016-08-30 | 2017-02-15 | 安正（天津）新材料股份有限公司 | Low smoke zero halogen (LSZH) flame retardant cable production device |
| CN208263384U (en) * | 2018-05-29 | 2018-12-21 | 德阳旌特线缆有限公司 | A kind of extrusion system |
| CN110189864A (en) * | 2019-05-22 | 2019-08-30 | 中国科学院电工研究所 | A kind of vibration feeding device |
| CN209747153U (en) * | 2019-05-09 | 2019-12-06 | 安徽凌宇电缆科技有限公司 | Double-layer thin-wall multi-core cable and cable core extrusion die thereof |
| CN209747209U (en) * | 2019-05-09 | 2019-12-06 | 安徽凌宇电缆科技有限公司 | single-layer insulation single-core fire-resistant cable and special production mold thereof |
| CN212096858U (en) * | 2020-04-16 | 2020-12-08 | 衢州市市政建设开发有限公司 | Cement pipe vibration forming device |
| CN113083921A (en) * | 2021-04-13 | 2021-07-09 | 东北大学 | Continuous ECAP plastic forming processing equipment of non ferrous metal with vibrating mechanism |
-
2021
- 2021-09-06 CN CN202111039558.7A patent/CN113764130B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB844199A (en) * | 1957-03-07 | 1960-08-10 | Standard Telephones Cables Ltd | Extrusion apparatus |
| GB1440933A (en) * | 1972-11-21 | 1976-06-30 | Bicc Ltd | Electromagnetic waveguides |
| JPH0647735A (en) * | 1992-07-30 | 1994-02-22 | Hitachi Cable Ltd | Guide cylinder of pellet cooling apparatus |
| CN102254597A (en) * | 2011-04-25 | 2011-11-23 | 江苏天地龙电缆有限公司 | Photovoltaic cable and manufacture method thereof |
| CN103419349A (en) * | 2013-07-30 | 2013-12-04 | 四川大学 | Polymer melt shear vibration extrusion molding device |
| CN105235175A (en) * | 2015-11-18 | 2016-01-13 | 李水清 | Efficient screw extruder |
| CN106409438A (en) * | 2016-08-30 | 2017-02-15 | 安正（天津）新材料股份有限公司 | Low smoke zero halogen (LSZH) flame retardant cable production device |
| CN208263384U (en) * | 2018-05-29 | 2018-12-21 | 德阳旌特线缆有限公司 | A kind of extrusion system |
| CN209747153U (en) * | 2019-05-09 | 2019-12-06 | 安徽凌宇电缆科技有限公司 | Double-layer thin-wall multi-core cable and cable core extrusion die thereof |
| CN209747209U (en) * | 2019-05-09 | 2019-12-06 | 安徽凌宇电缆科技有限公司 | single-layer insulation single-core fire-resistant cable and special production mold thereof |
| CN110189864A (en) * | 2019-05-22 | 2019-08-30 | 中国科学院电工研究所 | A kind of vibration feeding device |
| CN212096858U (en) * | 2020-04-16 | 2020-12-08 | 衢州市市政建设开发有限公司 | Cement pipe vibration forming device |
| CN113083921A (en) * | 2021-04-13 | 2021-07-09 | 东北大学 | Continuous ECAP plastic forming processing equipment of non ferrous metal with vibrating mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113764130A (en) | 2021-12-07 |
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