CN107706860A - Bus cable rmc monomer double loop bus duct - Google Patents
Bus cable rmc monomer double loop bus duct Download PDFInfo
- Publication number
- CN107706860A CN107706860A CN201711095610.4A CN201711095610A CN107706860A CN 107706860 A CN107706860 A CN 107706860A CN 201711095610 A CN201711095610 A CN 201711095610A CN 107706860 A CN107706860 A CN 107706860A
- Authority
- CN
- China
- Prior art keywords
- cable
- bus duct
- shell
- busbar
- bus
- 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
- 239000000178 monomer Substances 0.000 title claims abstract description 5
- 239000004020 conductor Substances 0.000 claims abstract description 32
- 238000009413 insulation Methods 0.000 claims abstract description 10
- 238000002955 isolation Methods 0.000 claims abstract description 3
- 230000005611 electricity Effects 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 2
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
Landscapes
- Details Of Indoor Wiring (AREA)
Abstract
The present invention relates to a kind of bus cable rmc monomer double loop bus duct, including shell；Wherein, there is superposed busbar receiving space and positioned at the cable holding space of bottom in shell, a plurality of busbar conductor is provided with busbar receiving space, a plurality of busbar conductor is electrically insulated by insulation phase isolation block between each other, and a plurality of cable is provided with cable holding space.The bus duct of the present invention is combined with the busbar conductor that can form power loop and the cable that can form lighting loop in single shell, is particularly suitable for needing while being equipped with power and light distribution circuit occasion, such as use in industrial premises and rail tunnel.
Description
Technical field
The present invention relates to a kind of bus duct；A kind of more particularly it relates to double back that bus and cable is combined
Road bus duct.
Background technology
Have to configure power electricity consumption and electric consumption on lighting simultaneously in industrial automation factory and traffic tunnel, in the past,
Various electricity consumption occasions including industrial automation factory and rail tunnel, generally using cable (for simplicity, originally
Electric wire and cable is referred to as cable in invention) conveying power electricity consumption and electric consumption on lighting, this power supply mode exist following
Problem：
1st, cable service life only has 18-25, and it is very high that cost is changed in midway；
2nd, power cable is related to heat dissipation problem, current-carrying capacity is difficult because being laid in together with light conduits in same groove conjunction
Ensure；
3rd, cable power supply occurs short circuit and easily triggers fire incident, and a certain circuit, which goes wrong, also influences whether All other routes
Safety；
4th, it is in a mess when cable is individually laid in tunnel, unsightly.
Although with China's industrial automation in recent years and the fast development of track traffic, more and more industrial automatic
Using bus duct progress power transmission and distribution in chemical plant and rail tunnel, but in market replacement cables bus duct function list
One, power electricity consumption or the conveying of electric consumption on lighting can only be respectively used to, is caused in industrial automation factory and rail tunnel etc.
The occasion for needing to configure power electricity consumption and electric consumption on lighting still has the problems such as electrical power trans mission/distribution system cost is high, installation maintenance is inconvenient.
The content of the invention
In view of the shortcomings of the prior art, the main object of the present invention is to provide a kind of that bus and cable is combined with simultaneously
The double loop bus duct of power electricity consumption and electric consumption on lighting is provided.
In order to realize above-mentioned main purpose, the invention provides a kind of bus cable rmc monomer double loop bus duct,
Including shell；Wherein, there is superposed busbar receiving space in shell and hold positioned at the cable holding space of bottom, busbar
Receive and be provided with a plurality of busbar conductor in space, a plurality of busbar conductor is electrically insulated by insulation phase isolation block between each other；Cable holding is empty
It is interior to be provided with a plurality of cable.
In the double loop bus duct of the present invention, it will thus provide the busbar conductor of power electricity consumption and the cable point that electric consumption on lighting is provided
Be not arranged in two relatively independent receiving spaces in shell so that bus duct have safe, service life is long, installation
Fast, the advantages that appearance looks elegant.
According to the present invention a kind of embodiment, shell include body, the upper cover plate installed in bodies top and
Installed in the lower cover of body bottom portion, body has the first side wall, second sidewall, dividing plate and bottom wall, and dividing plate separates busbar and accommodated
Space and cable holding space, bottom wall is formed with the strip gab along shell Longitudinal extending.
As a kind of preferred embodiment, the part that bottom wall is located at strip gab both lateral sides is each formed with towards on the inside of body
Turnup or inclined cable rib, the cable that the cable rib preferably can prevent to be carried on bottom wall fall out of strip gab
Go out.
As another preferred embodiment, cable release-resistant component is additionally provided with cable holding space, a plurality of cable is symmetrical
It is arranged at the both lateral sides of cable release-resistant component；The middle part of cable release-resistant component is connected with dividing plate, the both ends of cable release-resistant component
The part for being located at strip gab both lateral sides with bottom wall respectively is connected；Thus, cable release-resistant component can prevent cable from bar shaped
Dropped out in opening, and guide cable to be carried on the bottom wall of body.
According to a kind of more specific embodiment of the present invention, screw rod, the middle part set of cable release-resistant component are provided with dividing plate
It is located on screw rod, and is fixed or backstop by the threaded fastener being connected with screw flight.
According to another more specific embodiment of the present invention, above-mentioned cable release-resistant component includes flexible anti-drop belt, prevents
De- take is provided with multiple button holes and the fastening projection positioned at anti-drop belt both ends；Bottom wall is located at the part of strip gab both lateral sides
Perforated formed with fastening, the both ends of anti-drop belt pass through fastening to cause to fasten projection and button hole snapping after perforating.
According to another embodiment of the present invention, bus duct includes multiple sections, passes through connection between adjacent sections
Component connects, and connection component includes being used to realize the mother row connector that electrically connects between busbar conductor in adjacent sections and U
Shape connecting seat and the bottom plate installed in connecting seat bottom；Wherein, it is fixedly connected between connecting seat, bottom plate and mother row connector, and
Fixation contacts connection between connecting seat and body；Socket is provided with bottom plate, the puncture electrically connected with cable is provided with cable
Wire clamp, the neutral receptacle of socket electrically connect with the penetrating cable clamp being arranged on zero line cable, and the line receptacle of socket is with being arranged on
Penetrating cable clamp electrical connection in firewire cable.
As a kind of preferred embodiment, set on dividing plate formed with the longitudinal fluting to lower recess, the roof of connecting seat
There are protruding upward longitudinally convex, longitudinally convex both lateral sides formed with longitudinal spacing groove, longitudinally convex to be plugged in longitudinal direction recessed
Groove, to realize being mutually located between outer cover body and connecting seat.
As another preferred embodiment, shell and connecting seat are metal material, and bus duct is used as PE using metal shell
Conductor；The ground receptacle of socket electrically connects with connecting seat, and then is grounded by metal shell.
According to another embodiment of the present invention, the bottom of shell is provided for installing the U-shaped suspension bracket of illuminator,
The U-shaped suspension bracket is fixedly connected with the first side wall and second sidewall of body.
The present invention double loop bus duct can be used for simultaneously electric consumption on lighting and power electricity consumption are provided, have it is safe, make
The advantages that with long lifespan, quick for installation, appearance looks elegant.
In order to more clearly illustrate the objects, technical solutions and advantages of the present invention, with reference to embodiment to this
Invention is described in further detail.
Brief description of the drawings
Fig. 1 is the stereogram of bus duct embodiment 1 of the present invention；
Fig. 2 is the structure decomposition figure of bus duct embodiment 1 of the present invention；
Fig. 3 is the bottom view of bus duct embodiment 1 of the present invention；
Fig. 4 is the structure decomposition figure of mother row connector in bus duct embodiment 1 of the present invention；
Fig. 5 is the stereogram that mother row connector removes after connecting cover plate in bus duct embodiment 1 of the present invention；
Fig. 6 is the end view of bus duct embodiment 1 of the present invention；
Fig. 7 is the stereogram of cable release-resistant band in bus duct embodiment 1 of the present invention；
Fig. 8 is the structural representation of bus duct embodiment 2 of the present invention.
Embodiment
Embodiment 1
Fig. 1 is the stereogram of the double loop bus duct as the embodiment of the present invention 1, and the bus duct includes multiple Hes of section 10
The connection component 20 of adjacent sections is connected, one of section 10 is chosen below and the structure of the bus duct is illustrated.Such as
Shown in Fig. 1, the bus duct has metal shell 11, and it includes body 111, upper cover plate 112 and lower cover 113, and body 111 has
The first side wall 1111, second sidewall 1112, dividing plate 1113 and bottom wall 1114.The top of the first side wall 1111 and second sidewall 1112
It is each formed with the snap groove of Longitudinal extending with bottom, upper cover plate 112 and positioned at the first side wall 1111 and the top of second sidewall 1112
Snap groove be fastened and connected, lower cover 113 and positioned at the first side wall 1111 and the bottom of second sidewall 1112 snap groove fasten connect
Connect.
Dividing plate 1113 will be separated into superposed busbar receiving space 101 and the cable appearance positioned at bottom inside shell 11
Receive space 102.It is provided with a plurality of cable 13 in cable holding space 102, bottom wall 1114 is formed with along the Longitudinal extending of shell 11
Strip gab 1115, in order to which cable 13 is placed into cable holding space from the lower section of bus duct by strip gab 1115
In 102.A plurality of busbar conductor 12 is provided with busbar receiving space 101, a plurality of busbar conductor 12 is between each other by insulating every phase
Block (invisible in figure) mutually separates to realize electric insulation.A plurality of busbar conductor 12 includes three phase conductors and a N-conductor, and female
Wire casing is used as PE conductors using metal shell 11.In other embodiments of the invention, busbar conductor is configurable to include three
Phase conductor, a N-conductor and a PE conductor.
Fig. 2 is the structure decomposition figure of double loop bus duct shown in Fig. 1, and Fig. 3 is its bottom view.As shown in Fig. 2 connection group
Part 20 includes mother row connector 21, metal-connecting seat 22 and the bottom plate 23 installed in the bottom of connecting seat 22；Metal-connecting seat 22 is matched somebody with somebody
Be set to it is inverted U-shaped, in order to which cable 13 passes through；Pass through between the connecting cover plate 211 of connecting seat 22, bottom plate 23 and mother row connector 21
Such as the connector of screw (not shown) is fixedly connected, and fixation contacts connection between connecting seat 22 and body 111.Busbar
Connector 21 is used to realizing the electrical connection between PE connections conductor 14 between busbar conductor 12 in bus duct adjacent sections 10；
Wherein, PE connections conductor 14 and body 111 are fixed and contact connection, positioned at the end of shell 11 and parallel with busbar conductor 12 set
Put.
With reference to shown in Fig. 2 and 3, socket 24 is provided with bottom plate 23, is provided with cable 12 and is worn with what cable 12 electrically connected
Wire clamp 121 is pierced, the neutral receptacle of socket 24 passes through wire (not shown) and the penetrating cable clamp being arranged on zero line cable electricity
Connection, line receptacle electrically connect with the penetrating cable clamp being arranged in firewire cable, and ground receptacle electrically connects with connecting seat 22.
With continued reference to Fig. 2, formed with the longitudinal fluting 11131 to lower recess, the roof 222 of connecting seat 22 on dividing plate 1113
With protruding upward longitudinally convex 2221, the both lateral sides of longitudinally convex 2221 end are indulged formed with longitudinal spacing groove 2222
Longitudinal fluting 11131 is plugged in projection 2221, because longitudinal spacing groove 2222 defines longitudinally convex 2221 inserting depth,
Therefore being mutually located between the body 111 of shell 11 and connecting seat 22 can be realized.
Figure 4 and 5 illustrate in greater detail the structure of mother row connector 21.As shown in Figures 4 and 5, mother row connector 21 includes
Two pieces of connecting lateral plates 22, the polylith electric insulation baffle 23 being arranged between two pieces of connecting lateral plates 22 and inverted U-shaped connecting cover plate
211.Busbar conductor 12 in section 10, which connects conductor 14 with PE and stretches out in the longitudinal end of shell 11, is clamped in electric insulation baffle
Between 23.Each electric insulation baffle 23 includes electrically insulating base 231 and is separately positioned on the both side surface of electrically insulating base 231
Conductive plate 232, pass through conductive plate 232 between the busbar conductor 12 of adjacent sections 10, between PE connections conductor 14 and realize electrical connection.
Connecting lateral plate 22 and electric insulation baffle 23 are fastenedly connected by bolt 25 and nut 26.Wherein, set in the outside of connecting lateral plate 22
There are inserting groove 221 and elastomeric pad storage tank 222, the side wall of connecting cover plate 211 is plugged in the inserting groove on connecting lateral plate 22
221；Elastomeric pad 27 is set on bolt 25 and is arranged in storage tank 222, to cause connecting lateral plate 22 and electric insulation baffle
23, which can more firmly clamp busbar conductor 12, connects conductor 14 with PE.Referring to Fig. 5, in order to realize bolt 25 and conductive plate 232
Between electric insulation, insulating sleeve of electric 28 is additionally provided with bolt 25.
Fig. 6 is the end view of bus duct embodiment 1 of the present invention, and Fig. 7 is the stereogram of wherein cable release-resistant band, is tied below
The cable release-resistant structure for closing Fig. 6 and 7 pair of the present embodiment illustrates.On the one hand, interval point is provided with cable holding space 102
Multiple cable release-resistant components of cloth, the cable release-resistant component are made up of flexible cable release-resistant band 15, and a plurality of cable 13 is symmetrical
It is arranged at the both lateral sides of cable release-resistant band 15；The middle part of cable release-resistant band 15 is connected with dividing plate 1113, cable release-resistant band 15
The part that both ends are located at the both lateral sides of strip gab 1115 with bottom wall 1114 respectively is connected, and thus, cable release-resistant band 15 can hinder
Only cable 13 drops out out of strip gab 1115, and guides cable 13 to be carried on the bottom wall 1114 of body 111.On the other hand,
The part that bottom wall 1114 is located at strip gab 1115 (referring to Fig. 1 or 2) both lateral sides is each formed with turning on one's side towards in outer cover body 111
Volume or inclined cable rib 11141, to prevent the cable 13 being carried on bottom wall 1114 from being dropped out out of strip gab 1115.
The middle part of cable release-resistant band 15 has perforation 151, is provided with screw rod 16 on dividing plate 1113, in cable release-resistant band 15
Portion perforates via it and 151 is set on screw rod 16, and is fixed or backstop by the threaded fastener 17 being threadedly coupled with screw rod 16.
Multiple button holes 152 and the fastening projection 153 positioned at the both ends of anti-drop belt 15 are additionally provided with cable release-resistant band 15；Bottom wall 1114 is located at
The both lateral sides of strip gab 1115 are formed in part with fastening perforation (invisible in figure), and the both ends of cable release-resistant band 15 are passed through
After fastening perforation so that fasten projection 153 and the corresponding snapping of button hole 152.
Embodiment 2
Fig. 8 is the structural representation of bus duct embodiment 2 of the present invention.It is shown in Figure 8, the area of embodiment 2 and embodiment 1
It is not：The bottom of shell 11 is provided with the U-shaped suspension bracket 30 for installing illuminator 40, and the of U-shaped suspension bracket 30 and shell 11
One side wall 1111 is connected through a screw thread part 31 with second sidewall 1112 and is fixedly connected, and it is solid that illuminator 40 is connected through a screw thread part 41
It is scheduled on the lower section of U-shaped suspension bracket 30, the attaching plug (not shown) of illuminator 40 passes through the socket that is arranged on bottom plate 23
24 (referring to embodiments 1) obtain mains lighting supply.
Although depicting the present invention above by preferred embodiment, but it is to be understood that, those of ordinary skill in the art
In the invention scope for not departing from the present invention, all equal improvement made according to the present invention, protection scope of the present invention institute should be
Cover.
Claims (10)
1. a kind of bus cable rmc monomer double loop bus duct, including shell；Wherein, have in the shell superposed
Busbar receiving space and a plurality of busbar conductor, institute are provided with the cable holding space of bottom, the busbar receiving space
A plurality of busbar conductor is stated to be electrically insulated by insulation phase isolation block between each other；A plurality of cable is provided with the cable holding space.
2. bus duct as claimed in claim 1, wherein, the shell includes body, the upper lid installed in the bodies top
Plate and the lower cover installed in the body bottom portion, the body has the first side wall, second sidewall, dividing plate and bottom wall, described
Dividing plate separates the busbar receiving space and the cable holding space, and the bottom wall is formed with along the shell Longitudinal extending
Strip gab.
3. bus duct as claimed in claim 2, wherein, the bottom wall is located at the equal shape in part of the strip gab both lateral sides
Turnup or inclined cable rib on the inside of body described in Cheng Youchao.
4. bus duct as claimed in claim 2, wherein, cable release-resistant component, institute are additionally provided with the cable holding space
State the both lateral sides that a plurality of cable is symmetricly set in the cable release-resistant component；The middle part of the cable release-resistant component with it is described every
Plate connects, and the part that the both ends of the cable release-resistant component are located at the strip gab both lateral sides with the bottom wall respectively connects
Connect.
5. bus duct as claimed in claim 4, wherein, screw rod is provided with the dividing plate, in the cable release-resistant component
Portion is set on the screw rod, and is fixed or backstop by the threaded fastener being connected with the screw flight.
6. bus duct as claimed in claim 4, wherein, the cable release-resistant component includes flexible anti-drop belt, described anti-
De- take is provided with multiple button holes and the fastening projection positioned at the anti-drop belt both ends；The bottom wall is located at strip gab horizontal stroke
Be formed in part with fastening perforation to both sides, the both ends of the anti-drop belt through it is described fasten cause after perforation it is described fasten it is raised
With the button hole snapping.
7. bus duct as claimed in claim 2, it includes multiple sections, connected between adjacent sections by connection component, institute
Stating connection component includes being used to realize the mother row connector electrically connected between busbar conductor in adjacent sections and inverted U-shaped connection
Seat and the bottom plate installed in the connecting seat bottom；It is fixed between the connecting seat, the bottom plate and the mother row connector to connect
Connect, and fixation contacts connection between the connecting seat and the body；Socket is provided with the bottom plate, is set on the cable
There are the penetrating cable clamp electrically connected with the cable, the neutral receptacle of the socket and the penetrating cable clamp electricity being arranged on zero line cable
Connection, the line receptacle of the socket electrically connect with the penetrating cable clamp being arranged in firewire cable.
8. bus duct as claimed in claim 7, wherein, formed with the longitudinal fluting to lower recess, the company on the dividing plate
The roof of joint chair is provided with protruding upward longitudinally convex, and the longitudinally convex both lateral sides are formed with longitudinal spacing groove, institute
State it is longitudinally convex be plugged in the longitudinal fluting, to realize being mutually located between the outer cover body and the connecting seat.
9. bus duct as claimed in claim 7, wherein, the shell and the connecting seat are metal material, the bus
Groove is used as PE conductors using the metal shell；The ground receptacle of the socket electrically connects with the connecting seat.
10. bus duct as claimed in claim 2, wherein, the U-shaped that the bottom of the shell is provided for installing illuminator is hung
Frame, the U-shaped suspension bracket are fixedly connected with the first side wall and second sidewall of the body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711095610.4A CN107706860B (en) | 2017-11-09 | 2017-11-09 | Bus cable combined single double-loop bus duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711095610.4A CN107706860B (en) | 2017-11-09 | 2017-11-09 | Bus cable combined single double-loop bus duct |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107706860A true CN107706860A (en) | 2018-02-16 |
| CN107706860B CN107706860B (en) | 2024-01-16 |
Family
ID=61178344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711095610.4A Active CN107706860B (en) | 2017-11-09 | 2017-11-09 | Bus cable combined single double-loop bus duct |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107706860B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066542A (en) * | 2018-06-01 | 2018-12-21 | 江苏华强电力设备有限公司 | A kind of big intensity light illumination bus duct of small size |
| CN110086133A (en) * | 2018-08-27 | 2019-08-02 | 佛山市创森机电有限公司 | A kind of high temperature bus duct |
| CN112243554A (en) * | 2019-05-17 | 2021-01-19 | 伊艾电机起卸机工业建筑工业及贸易有限公司 | Conductor stop device for bus |
| US20220173584A1 (en) * | 2020-07-06 | 2022-06-02 | Starline Holdings, Llc | Systems and Methods for Dust and Liquid Protected Continuous Access Busway Trunking Systems |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7744386B1 (en) * | 2009-11-02 | 2010-06-29 | Lighting Services Inc. | High amperage busway system |
| CN102918722A (en) * | 2010-04-22 | 2013-02-06 | 宇宙电子公司 | Improved press-fit busbar and busway employing same |
| CN203522067U (en) * | 2013-09-16 | 2014-04-02 | 广东华通成套电气有限公司 | Combined type bus duct |
| CN107046264A (en) * | 2017-03-28 | 2017-08-15 | 珠海光乐电力母线槽有限公司 | Power, lighting integrated double loop bus duct and its electrical power trans mission/distribution system |
| CN207542731U (en) * | 2017-11-09 | 2018-06-26 | 珠海光乐电力母线槽有限公司 | Bus cable rmc monomer double loop bus duct |
-
2017
- 2017-11-09 CN CN201711095610.4A patent/CN107706860B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7744386B1 (en) * | 2009-11-02 | 2010-06-29 | Lighting Services Inc. | High amperage busway system |
| CN102918722A (en) * | 2010-04-22 | 2013-02-06 | 宇宙电子公司 | Improved press-fit busbar and busway employing same |
| CN203522067U (en) * | 2013-09-16 | 2014-04-02 | 广东华通成套电气有限公司 | Combined type bus duct |
| CN107046264A (en) * | 2017-03-28 | 2017-08-15 | 珠海光乐电力母线槽有限公司 | Power, lighting integrated double loop bus duct and its electrical power trans mission/distribution system |
| CN207542731U (en) * | 2017-11-09 | 2018-06-26 | 珠海光乐电力母线槽有限公司 | Bus cable rmc monomer double loop bus duct |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066542A (en) * | 2018-06-01 | 2018-12-21 | 江苏华强电力设备有限公司 | A kind of big intensity light illumination bus duct of small size |
| CN110086133A (en) * | 2018-08-27 | 2019-08-02 | 佛山市创森机电有限公司 | A kind of high temperature bus duct |
| CN112243554A (en) * | 2019-05-17 | 2021-01-19 | 伊艾电机起卸机工业建筑工业及贸易有限公司 | Conductor stop device for bus |
| US20220173584A1 (en) * | 2020-07-06 | 2022-06-02 | Starline Holdings, Llc | Systems and Methods for Dust and Liquid Protected Continuous Access Busway Trunking Systems |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107706860B (en) | 2024-01-16 |
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