EP3453082A1 - Large conductor industrial plug - Google Patents

Large conductor industrial plug

Info

Publication number
EP3453082A1
EP3453082A1 EP17793338.9A EP17793338A EP3453082A1 EP 3453082 A1 EP3453082 A1 EP 3453082A1 EP 17793338 A EP17793338 A EP 17793338A EP 3453082 A1 EP3453082 A1 EP 3453082A1
Authority
EP
European Patent Office
Prior art keywords
plug
load bar
openings
inches
wire
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.)
Pending
Application number
EP17793338.9A
Other languages
German (de)
French (fr)
Other versions
EP3453082A4 (en
Inventor
Justin Wagner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sentinel Connector Systems Inc
Original Assignee
Sentinel Connector Systems Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sentinel Connector Systems Inc filed Critical Sentinel Connector Systems Inc
Priority claimed from PCT/US2017/031055 external-priority patent/WO2017192848A1/en
Publication of EP3453082A1 publication Critical patent/EP3453082A1/en
Publication of EP3453082A4 publication Critical patent/EP3453082A4/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
    • H01R13/5804—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable comprising a separate cable clamping part
    • H01R13/5816—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable comprising a separate cable clamping part for cables passing through an aperture in a housing wall, the separate part being captured between cable and contour of aperture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
    • H01R13/582—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable the cable being clamped between assembled parts of the housing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
    • H01R13/5837—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable specially adapted for accommodating various sized cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2107/00—Four or more poles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/60—Contacts spaced along planar side wall transverse to longitudinal axis of engagement
    • H01R24/62—Sliding engagements with one side only, e.g. modular jack coupling devices
    • H01R24/64—Sliding engagements with one side only, e.g. modular jack coupling devices for high frequency, e.g. RJ 45

Definitions

  • One embodiment of the present disclosure includes a communication plug including a plug body, a cavity in the plug body, the cavity having a first portion, a second portion and a third portion, a load bar having a plurality of openings on a front face of the load bar, where the cavity is sized to engage the load bar such that the load bar directs at least one wire inserted into a corresponding opening in the load bar into channels in the plug.
  • a first group of openings are arranged in an upper face of the load bar and a second group of openings are arranged in a lower face of the load bar.
  • the first group of openings are at a level higher than the channels in the plug.
  • the second group of openings are at a level lower than the channels in the plug.
  • the plug includes a plurality of first guides with each guide aligning with a corresponding opening in the upper face of the load bar.
  • the plug includes a plurality of second guides with each guide aligning with a corresponding opening in the lower face of the load bar.
  • the diameter of the wire is at least 0.056 inches.
  • the diameter of the wire is approximately 0.056 inches .
  • the diameter of the wire is approximately 0.058 inches.
  • the distance between the centers of the first openings is approximately 0.040 inches.
  • an RJ 45 communication plug including a plug body, a cavity in the plug body, the cavity having a first portion, a second portion and a third portion, a load bar having a plurality of openings on a front face of the load bar, where the cavity is sized to engage the load bar such that the load bar directs at least one wire inserted into a corresponding opening in the load bar into channels in the plug.
  • a first group of openings are arranged in an upper face of the load bar and a second group of openings are arranged in a lower face of the load bar.
  • the first group of openings are at a level higher than the channels in the plug.
  • the second group of openings are at a level lower than the channels in the plug.
  • the plug includes a plurality of second guides with each guide aligning with a corresponding opening in the lower face of the load bar.
  • the diameter of the wire is at least 0.056 inches.
  • the diameter of the wire is approximately 0.056 inches .
  • the diameter of the wire is approximately 0.058 inches.
  • the distance between openings is between 0.040 and 0.030 inches.
  • FIG. 1 depicts a one embodiment of a high speed network plug
  • FIG. 2 depicts a front view of the load bar
  • FIG 3 depicts a side view of the plug
  • FIG. 4 depicts an exploded view of the plug assembly with a wire inserted into the plug.
  • FIG. 1 depicts a one embodiment of a high speed network plug 100.
  • the plug 100 includes a plug base 102 and a cover 104 surrounding a portion of the plug base 102.
  • the plug base 102 includes a plurality of pins 106 positioned in channels in made in a top surface of the plug base 102.
  • the cover 104 includes a wire engagement unit 108 positioned on a side of the plug base 102 furthest from the pins 106.
  • the wire engagement unit 108 is configured to engage the exterior surface of a wire inserted into the wire engagement unit 108.
  • the plug 100 includes a load bar 110 that is sized to engage an opening (not shown) in the plug base 102.
  • FIG. 2 depicts a front view of the load bar 110 of FIG. 1.
  • the load bar 110 includes a plurality of openings 202, 204, 206, 208, 210, 212, 214 and 216 across a front face of the load bar 110.
  • Each of the openings 202, 204, 206, 208, 210, 212, 214 and 216 is sized to accommodate a having diameter of 0.060 in or larger.
  • each of the openings 202, 204, 206, 208, 210, 212, 214 and 216 is sized to accommodate a having diameter of 0.056 in or larger.
  • Each opening 202, 204, 206, 208, 210, 212, 214 and 216 is separated from an adjacent opening 202, 204, 206, 208, 210, 212, 214 or 216 by a distance.
  • the distance between openings 202, 204, 206, 208, 210, 212, 214 and 216 is the same for each opening 202, 204, 206, 208, 210, 212, 214 or 216.
  • the distance between openings 202, 204, 206, 208, 210, 212, 214 and 216 varies. Consistent with this embodiment, the distance 218 between an edge of opening 202 and an edge of opening 210 may be approximately 0.010 inches.
  • the distance 220 between an edge of opening 206 and an edge of opening 216 may be 0.012 inches.
  • the distance between center lines of adjacent openings 202, 204, 206, 208, 210, 212, 214 or 216 may be equal. In another embodiment, the distance between center lines of adjacent openings 202, 204, 206, 208, 210, 212, 214 or 216 varies.
  • the distance between the center of opening 202 and the center of opening 210 is 0.030 inches
  • the distance between the center of opening 202 and the center of opening 212 is 0.040 inches
  • the distance between the center of opening 212 and the center of opening 204 is 0.040 inches
  • the distance between the center of opening 204 and the center of opening 214 is 0.040 inches
  • the distance between the center of opening 214 and the center of opening 206 is 0.040 inches
  • the distance between the center of opening 206 and the center of opening 216 is 0.040 inches
  • the distance between the center of opening 216 and the center of opening 208 is 0.030 inches.
  • FIG 3 depicts a side view of the plug 100.
  • the plug 100 includes an opening 300 and cavity 302 with the cavity 302 having a first portion 304 having a first height, second portion 306 having a second height and a third portion 308 having a third height.
  • the first portion 302 height is substantially the same along the length of the first portion 302.
  • the height of the second portion 306 slopes from the height of the first portion 304 to the height of the third portion 308 along the length of the second portion 306.
  • the opening 300 and cavity 302 are sized to accommodate the load bar 110 such that the load bar 110 passes through the opening 300 into the first portion 304 of the cavity 302.
  • Upper guide 310 and lower guide 312 are positioned on an upper and lower surface of the cavity 302 in the second portion 306 and third portion 308.
  • the guides 310 and 312 are formed to create channels that accommodate individual s of a wire such that the s are positioned underneath a respective pin 106 when a wire is inserted into the plug 100.
  • the opening 300 and first portion 304 of the cavity 302 are sized to accommodate the load bar 110 such that the front face of the load bar 110 engages the ends of the guides 310 in the second portion 306 of the cavity 302.
  • the openings 202, 204, 206, 208, 210, 212, 214 and 216 in the load bar 110 are positioned such that a wire inserted into each opening 202, 204, 206, 208, 210, 212, 214 and 216 is guided into a specific channel created by the guides 310 and 312.
  • the upper guides 310 are angled from the horizontal by an angle ⁇ and the lower guides are angled from the horizontal by an angle ⁇ .
  • the guides 310 and 312 act to direct each in the wire from the outlet of the openings 202, 204, 206, 208, 210, 212, 214 and 216 into a respective slot without adjacent s being in contact.
  • FIG. 4 depicts an exploded view of the plug assembly with a wire inserted into the plug.
  • Each of the wires is bent at an angle such that the separation of each wire in the load bar is larger than the vertical separation the s passing through openings 202, 204, 206 and 208 and the s passing through openings 210, 212, 214 and 216 is larger as the s exit the load bar 110 than at the entry to the slots in the plug.

Abstract

A communication plug including a plug body, a cavity in the plug body, the cavity having a first portion, a second portion and a third portion, a load bar having a plurality of openings on a front face of the load bar, where the cavity is sized to engage the load bar such that the load bar directs at least one wire inserted into a corresponding opening in the load bar into channels in the plug.

Description

LARGE CONDUCTOR INDUSTRIAL PLUG
PRIORITY CLAIM
[0001] The present disclosure is a PCT of U.S. Provisional Patent Application No. 62/331,485, filed on May 4, 2016 and U.S. Non-Provisional Patent Application No. 15/586,435, filed on May 4, 2017, which are incorporated by reference herein in their entirety.
BACKGROUND OF THE INVENTION
[0002] Many network topologies call for the use of larger insulated conductor wire. Connecting large insulated conductor wire into a plug has presented numerous challenges do to the inability to produce structures capable of engaging the large insulated conductor wire. This lack of structure crates numerous problems with interconnections in a standard network plug, which leads to a issues with data transmission.
[0003] A need exists for a plug that provides a method of terminating large conductors into a modular plug in an improved assemble method. .
BRIEF SUMMARY OF THE INVENTION
[0004] One embodiment of the present disclosure includes a communication plug including a plug body, a cavity in the plug body, the cavity having a first portion, a second portion and a third portion, a load bar having a plurality of openings on a front face of the load bar, where the cavity is sized to engage the load bar such that the load bar directs at least one wire inserted into a corresponding opening in the load bar into channels in the plug.
[0005] In another embodiment, a first group of openings are arranged in an upper face of the load bar and a second group of openings are arranged in a lower face of the load bar.
[0006] In another embodiment, the first group of openings are at a level higher than the channels in the plug. [0007] In another embodiment, the second group of openings are at a level lower than the channels in the plug.
[0008] In another embodiment, the plug includes a plurality of first guides with each guide aligning with a corresponding opening in the upper face of the load bar.
[0009] In another embodiment, the plug includes a plurality of second guides with each guide aligning with a corresponding opening in the lower face of the load bar.
[0010] In another embodiment, the diameter of the wire is at least 0.056 inches.
[0011] In another embodiment, the diameter of the wire is approximately 0.056 inches .
[0012] In another embodiment, the diameter of the wire is approximately 0.058 inches.
[0013] In another embodiment, the distance between the centers of the first openings is approximately 0.040 inches.
[0014] Another embodiment of the present disclosure includes an RJ 45 communication plug including a plug body, a cavity in the plug body, the cavity having a first portion, a second portion and a third portion, a load bar having a plurality of openings on a front face of the load bar, where the cavity is sized to engage the load bar such that the load bar directs at least one wire inserted into a corresponding opening in the load bar into channels in the plug.
[0015] In another embodiment, a first group of openings are arranged in an upper face of the load bar and a second group of openings are arranged in a lower face of the load bar.
[0016] In another embodiment, the first group of openings are at a level higher than the channels in the plug.
[0017] In another embodiment, the second group of openings are at a level lower than the channels in the plug. [0018] In another embodiment, the plug includes a plurality of second guides with each guide aligning with a corresponding opening in the lower face of the load bar. [0019] In another embodiment, the diameter of the wire is at least 0.056 inches. [0020] In another embodiment, the diameter of the wire is approximately 0.056 inches . [0021] In another embodiment, the diameter of the wire is approximately 0.058 inches. [0022] In another embodiment, the distance between openings is between 0.040 and 0.030 inches.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
[0023] Details of the present invention, including non-limiting benefits and advantages, will become more readily apparent to those of ordinary skill in the relevant art after reviewing the following detailed description and accompanying drawings, wherein: [0024] FIG. 1 depicts a one embodiment of a high speed network plug; [0025] FIG. 2 depicts a front view of the load bar; [0026] FIG 3 depicts a side view of the plug; and
[0027] FIG. 4 depicts an exploded view of the plug assembly with a wire inserted into the plug.
DETAILED DESCRIPTION OF THE INVENTION
[0028] FIG. 1 depicts a one embodiment of a high speed network plug 100. The plug 100 includes a plug base 102 and a cover 104 surrounding a portion of the plug base 102. The plug base 102 includes a plurality of pins 106 positioned in channels in made in a top surface of the plug base 102. The cover 104 includes a wire engagement unit 108 positioned on a side of the plug base 102 furthest from the pins 106. The wire engagement unit 108 is configured to engage the exterior surface of a wire inserted into the wire engagement unit 108. The plug 100 includes a load bar 110 that is sized to engage an opening (not shown) in the plug base 102.
[0029] FIG. 2 depicts a front view of the load bar 110 of FIG. 1. The load bar 110 includes a plurality of openings 202, 204, 206, 208, 210, 212, 214 and 216 across a front face of the load bar 110. Each of the openings 202, 204, 206, 208, 210, 212, 214 and 216 is sized to accommodate a having diameter of 0.060 in or larger. In another embodiment, each of the openings 202, 204, 206, 208, 210, 212, 214 and 216 is sized to accommodate a having diameter of 0.056 in or larger. Each opening 202, 204, 206, 208, 210, 212, 214 and 216 is separated from an adjacent opening 202, 204, 206, 208, 210, 212, 214 or 216 by a distance. In one embodiment, the distance between openings 202, 204, 206, 208, 210, 212, 214 and 216 is the same for each opening 202, 204, 206, 208, 210, 212, 214 or 216. In another embodiment, the distance between openings 202, 204, 206, 208, 210, 212, 214 and 216 varies. Consistent with this embodiment, the distance 218 between an edge of opening 202 and an edge of opening 210 may be approximately 0.010 inches. The distance 220 between an edge of opening 206 and an edge of opening 216 may be 0.012 inches.
[0030] In one embodiment, the distance between center lines of adjacent openings 202, 204, 206, 208, 210, 212, 214 or 216 may be equal. In another embodiment, the distance between center lines of adjacent openings 202, 204, 206, 208, 210, 212, 214 or 216 varies. Consistent with this embodiment, the distance between the center of opening 202 and the center of opening 210 is 0.030 inches, the distance between the center of opening 202 and the center of opening 212 is 0.040 inches, the distance between the center of opening 212 and the center of opening 204 is 0.040 inches, the distance between the center of opening 204 and the center of opening 214 is 0.040 inches, the distance between the center of opening 214 and the center of opening 206 is 0.040 inches, the distance between the center of opening 206 and the center of opening 216 is 0.040 inches and the distance between the center of opening 216 and the center of opening 208 is 0.030 inches.
[0031] FIG 3 depicts a side view of the plug 100. The plug 100 includes an opening 300 and cavity 302 with the cavity 302 having a first portion 304 having a first height, second portion 306 having a second height and a third portion 308 having a third height. The first portion 302 height is substantially the same along the length of the first portion 302. The height of the second portion 306 slopes from the height of the first portion 304 to the height of the third portion 308 along the length of the second portion 306. The opening 300 and cavity 302 are sized to accommodate the load bar 110 such that the load bar 110 passes through the opening 300 into the first portion 304 of the cavity 302. Upper guide 310 and lower guide 312 are positioned on an upper and lower surface of the cavity 302 in the second portion 306 and third portion 308. The guides 310 and 312 are formed to create channels that accommodate individual s of a wire such that the s are positioned underneath a respective pin 106 when a wire is inserted into the plug 100.
[0032] The opening 300 and first portion 304 of the cavity 302 are sized to accommodate the load bar 110 such that the front face of the load bar 110 engages the ends of the guides 310 in the second portion 306 of the cavity 302. The openings 202, 204, 206, 208, 210, 212, 214 and 216 in the load bar 110 are positioned such that a wire inserted into each opening 202, 204, 206, 208, 210, 212, 214 and 216 is guided into a specific channel created by the guides 310 and 312. The upper guides 310 are angled from the horizontal by an angle Θ and the lower guides are angled from the horizontal by an angle λ. The guides 310 and 312 act to direct each in the wire from the outlet of the openings 202, 204, 206, 208, 210, 212, 214 and 216 into a respective slot without adjacent s being in contact.
[0033] FIG. 4 depicts an exploded view of the plug assembly with a wire inserted into the plug. Each of the wires is bent at an angle such that the separation of each wire in the load bar is larger than the vertical separation the s passing through openings 202, 204, 206 and 208 and the s passing through openings 210, 212, 214 and 216 is larger as the s exit the load bar 110 than at the entry to the slots in the plug.
[0034] In the present disclosure, the words "a" or "an" are to be taken to include both the singular and the plural. Conversely, any reference to plural items shall, where appropriate, include the singular.
[0035] It should be understood that various changes and modifications to the presently preferred embodiments disclosed herein will be apparent to those skilled in the art. Such changes and modifications can be made without departing from the spirit and scope of the present disclosure and without diminishing its intended advantages. It is therefore intended that such changes and modifications be covered by the appended claims.

Claims

1. A communication plug including:
a plug body;
a cavity in the plug body, the cavity having a first portion, a second portion and a third portion;
a load bar having a plurality of openings on a front face of the load bar, wherein,
the cavity is sized to engage the load bar such that the load bar directs at least one wire inserted into a corresponding opening in the load bar into channels in the plug.
2. The communication plug of claim 1 wherein a first group of openings are arranged in an upper face of the load bar and a second group of openings are arranged in a lower face of the load bar.
3. The communication plug of claim 2 wherein the first group of openings are at a level higher than the channels in the plug.
4. The communication plug of claim 2 wherein the second group of openings are at a level lower than the channels in the plug.
5. The communication plug of claim 3 including a plurality of first guides with each guide aligning with a corresponding opening in the upper face of the load bar.
6. The communication plug of claim 4 including a plurality of second guides with each guide aligning with a corresponding opening in the lower face of the load bar.
7. The communication plug of claim 1 wherein the diameter of the wire is at least 0.056 inches.
8. The communication plug of claim 1 wherein the diameter of the wire is approximately 0.056 inches .
9. The communication plug of claim 1 wherein the diameter of the wire is approximately 0.058 inches.
10. The communication plug of claim 1 wherein the distance between the centers of the first openings is approximately 0.040 inches.
11. An RJ 45 communication plug including:
a plug body;
a cavity in the plug body, the cavity having a first portion, a second portion and a third portion;
a load bar having a plurality of openings on a front face of the load bar, wherein,
the cavity is sized to engage the load bar such that the load bar directs at least one wire inserted into a corresponding opening in the load bar into channels in the plug.
12. The RJ 45 communication plug of claim 11 wherein a first group of openings are arranged in an upper face of the load bar and a second group of openings are arranged in a lower face of the load bar.
13. The RJ 45 communication plug of claim 12 wherein the first group of openings are at a level higher than the channels in the plug.
14. The RJ 45 communication plug of claim 12 wherein the second group of openings are at a level lower than the channels in the plug.
15. The RJ 45 communication plug of claim 13 including a plurality of first guides with each guide aligning with a corresponding opening in the upper face of the load bar.
16. The RJ 45 communication plug of claim 14 including a plurality of second guides with each guide aligning with a corresponding opening in the lower face of the load bar.
17. The RJ 45 communication plug of claim 11 wherein the diameter of the wire is at least 0.056 inches.
18. The RJ 45 communication plug of claim 11 wherein the diameter of the wire is approximately 0.056 inches .
19. The RJ 45 communication plug of claim 11 wherein the diameter of the wire is approximately 0.058 inches.
20. The RJ 45 communication plug of claim 11 wherein the distance between openings is between 0.040 and 0.030 inches.
EP17793338.9A 2016-05-04 2017-05-04 Large conductor industrial plug Pending EP3453082A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201662331485P 2016-05-04 2016-05-04
PCT/US2017/031055 WO2017192848A1 (en) 2016-05-04 2017-05-04 Large conductor industrial plug

Publications (2)

Publication Number Publication Date
EP3453082A1 true EP3453082A1 (en) 2019-03-13
EP3453082A4 EP3453082A4 (en) 2020-01-01

Family

ID=65238440

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17793338.9A Pending EP3453082A4 (en) 2016-05-04 2017-05-04 Large conductor industrial plug

Country Status (2)

Country Link
EP (1) EP3453082A4 (en)
CN (1) CN109417255B (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601530A (en) * 1984-08-30 1986-07-22 Amp Incorporated Electrical connector and wire assembly method
US6439920B1 (en) * 2001-09-18 2002-08-27 Surtec Industries Inc. Electronic connector plug for high speed transmission

Also Published As

Publication number Publication date
CN109417255B (en) 2021-04-16
EP3453082A4 (en) 2020-01-01
CN109417255A (en) 2019-03-01

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