CN105206401A - Multiphase multi-pulse wave rectifier transformer - Google Patents
Multiphase multi-pulse wave rectifier transformer Download PDFInfo
- Publication number
- CN105206401A CN105206401A CN201510595225.0A CN201510595225A CN105206401A CN 105206401 A CN105206401 A CN 105206401A CN 201510595225 A CN201510595225 A CN 201510595225A CN 105206401 A CN105206401 A CN 105206401A
- Authority
- CN
- China
- Prior art keywords
- winding
- phase
- phase winding
- tap
- secondary winding
- 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
Links
- 238000004804 winding Methods 0.000 claims abstract description 254
- 239000002184 metal Substances 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000010363 phase shift Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
Landscapes
- Rectifiers (AREA)
Abstract
The invention provides a multiphase multi-pulse rectifier transformer, which comprises a transformer frame and windings, wherein the windings comprise an A-phase winding, a B-phase winding and a C-phase winding, the transformer frame comprises iron core upright columns corresponding to the windings of all phases, and the multiphase multi-pulse rectifier transformer is characterized in that: and the A-phase winding, the B-phase winding and the C-phase winding are respectively divided into N: n +1, a primary winding and a secondary winding are arranged at intervals in proportion, and N is a natural number; each secondary winding is provided with a head end tap, a tail end tap and at least one middle tap, and each secondary winding is connected to the rectifying module to output. The invention realizes the multi-pulse rectification output of the symmetrical phase shift of the output winding of a single transformer, greatly improves the influence of harmonic waves at the output side on the power grid at the input side of the transformer, and effectively reduces the volume, the processing difficulty and the manufacturing cost of the transformer by adopting the stacking structure of metal pressing sheets for each winding; and the number of turns of the winding is adjusted by the number of the metal pressing sheets, so that any transformation ratio of the input side and the output side can be realized.
Description
Technical field
The invention belongs to electrical equipment technical field, be specifically related to a kind of heterogeneous multi-pulse rectification transformer.
Background technology
Along with the power of switch power supply equipment increases, it also strengthens day by day on the impact of power consumption equipment in overall grid and net, makes to produce serious harmonic pollution in net.For large-power occasions that is tens of, even hundred kilowatts, existingly general suppressed by multi-pulse rectification technology or offset the harmonic wave of some specific times in input current, wherein common are 12 pulse waves, 18 pulse waves and 24 pulse wave circuit, and the bind mode of its primary and secondary winding roughly there are 3 kinds: indentation, hexagon and extend-triangle connection.
Summary of the invention
Based on above-mentioned technical background, the present invention proposes a kind of heterogeneous multi-pulse rectification transformer, and realize the multi-pulse rectification output that single transformer exports the symmetrical phase shift of winding, its concrete technology contents is as follows:
A kind of heterogeneous multi-pulse rectification transformer, comprise transformer framework and winding, described winding comprises A phase winding, B phase winding and C phase winding, described transformer framework comprises the iron core column of corresponding each phase winding, arrange simple winding and secondary winding by the proportional spacing of N:N+1 respectively in the middle of described A phase winding, B phase winding and C phase winding, N is natural number; Described each secondary winding has head end tap, end tap and at least one centre tap, and each secondary winding is connected to rectification module respectively and exports.
In the middle of one or more embodiment of the present invention, comprise the first secondary winding of sequence interval setting, the first simple winding, second subprime winding, the second simple winding in the middle of described A phase winding, B phase winding and C phase winding respectively, organize winding, the 3rd simple winding and the 4th secondary winding for the third time;
Wherein, first secondary winding of described A phase winding, first secondary winding of B phase winding and first level winding switching to the first rectification module of C phase winding, the second subprime winding of described A phase winding, the second subprime winding of B phase winding and second subprime winding switching to the second rectification module of C phase winding, the third time level winding of described A phase winding, B phase winding third time level winding and C phase winding third time level winding switching to the 3rd rectification module, 4th secondary winding of described A phase winding, 4th secondary winding of B phase winding and the 4th secondary winding of C phase winding are connected to the 4th rectification module,
Described first, second, third and fourth rectification module connects output in serial or parallel connection mode.
In the middle of one or more embodiment of the present invention, after described A phase, B phase and C phase winding the first simple winding separately, the second simple winding and the 3rd simple winding are connected successively, each press-type or wye connection connect again mutually.
In the middle of one or more embodiment of the present invention, centre tap is connected with end tap press-type or wye connection with the first secondary winding of C phase by the first secondary winding of described A phase, the first secondary winding of B phase, and each head end tap is connected to the first rectification module; Centre tap is connected with end tap press-type or wye connection with the second subprime winding of C phase by the second subprime winding of described A phase, the second subprime winding of B phase, and each head end tap is connected to the second rectification module; Centre tap is connected with end tap press-type or wye connection with the third time level winding of C phase, and each head end tap is connected to the 3rd rectification module by the third time level winding of described A phase, the third time level winding of B phase; Centre tap is connected with end tap press-type or wye connection with the 4th secondary winding of C phase, and each head end tap is connected to the 4th rectification module by the 4th secondary winding of described A phase, the 4th secondary winding of B phase.
In the middle of one or more embodiment of the present invention, described each winding forms by the some metal sheetings be wound on iron core column are stacking respectively, and this metal sheeting is the strip of wound core column, has part in electrical contact between adjacent metal compressing tablet.
In the middle of one or more embodiment of the present invention, described A phase winding, B phase winding, C phase winding iron core column is separately at least one.
Preferably, described A phase winding, B phase winding, C phase winding iron core column is separately three.
The present invention can suppress the distortion of transformer output voltage, improves the impact that outlet side harmonic wave causes its input side electrical network greatly, and each winding adopts the stacked structure of metal sheeting simultaneously, effectively reduces the volume of transformer, difficulty of processing and manufacturing cost; And the adjustment of umber of turn is realized by metal sheeting quantity, any no-load voltage ratio of input side and outlet side can be realized.
Accompanying drawing explanation
Fig. 1 is the principle framework figure of heterogeneous multi-pulse rectification transformer of the present invention.
Fig. 2 is the overall structure schematic diagram of heterogeneous multi-pulse rectification transformer embodiments one of the present invention.
Fig. 3 is the structural representation of the winding of heterogeneous multi-pulse rectification transformer embodiments one of the present invention.
Fig. 4 is the winding line graph of heterogeneous multi-pulse rectification transformer embodiments one of the present invention.
Fig. 5 is that the rectification module of heterogeneous multi-pulse rectification transformer of the present invention exports line graph (series connection).
Fig. 6 is that the rectification module of heterogeneous multi-pulse rectification transformer of the present invention exports line graph (parallel connection).
Fig. 7 is the overall structure schematic diagram of heterogeneous multi-pulse rectification transformer embodiments two of the present invention.
Embodiment
As shown in figures 2-6, preferred embodiment one of the present invention:
A kind of heterogeneous multi-pulse rectification transformer, comprise transformer framework 11 and winding, described winding comprises A phase winding, B phase winding and C phase winding, described transformer framework 11 comprises three iron core columns 12, corresponding A respectively, B, the each phase winding of C, described A phase winding, respectively simple winding 21 and secondary winding 22 are set by the proportional spacing of N:N+1 in the middle of B phase winding and C phase winding, each simple winding 21 and secondary winding 22 arrange some taps 23 for wiring respectively, described each simple winding 21 has head end and end tap, described each secondary winding 22 has head end, end and centre tap.
Wherein, described head end refers to the top of this winding, and described end refers to this winding bottom, and centre tap, then according to the phase shift requirement of this winding, arranges the some numbers of turn of distance head end tap.
The simple winding 21 of ratio setting and the secondary winding 22 of 3:4 is pressed, namely in the present embodiment
In the middle of described A phase winding, B phase winding and C phase winding, from top to bottom sequence interval is provided with the first secondary winding, the first simple winding, second subprime winding, the second simple winding, organizes winding, the 3rd simple winding and the 4th secondary winding for the third time;
Wherein, first secondary winding A1 of described A phase winding, first secondary winding B1 of B phase winding and the first secondary winding C1 of C phase winding is connected to the first rectification module 31, the second subprime winding A1 of described A phase winding, the second subprime winding B2 of B phase winding and the second subprime winding C2 of C phase winding is connected to the second rectification module 32, the third time level winding A3 of described A phase winding, the third time level winding B3 of B phase winding and the third time level winding C3 of C phase winding is connected to the 3rd rectification module 33, 4th secondary winding A4 of described A phase winding, 4th secondary winding B4 of B phase winding and the 4th secondary winding C4 of C phase winding is connected to the 4th rectification module 34,
As shown in Figure 4, after described A phase winding, B phase winding and C phase winding the first simple winding (A01, B01, C01) separately, the second simple winding (A02, B02, C02) and the 3rd simple winding (A03, B03, C03) are connected respectively successively, each press-type connection connection mutually.
The end tap of the first secondary winding A1 of described A phase connects the centre tap of the first secondary winding B1 of B phase, the end tap of the first secondary winding B1 of described B phase connects the centre tap of the first secondary winding C1 of C phase, the end tap of the first secondary winding C1 of described C phase connects the centre tap of the first secondary winding A1 of A phase, realizes θ
1the phase shift of angle.
The end tap of the second subprime winding A2 of described A phase connects the centre tap of the second subprime winding B2 of B phase, the end tap of the second subprime winding B2 of described B phase connects the centre tap of the second subprime winding C2 of C phase, the end tap of the second subprime winding C2 of described C phase connects the centre tap of the second subprime winding A2 of A phase, realizes θ
2the phase shift of angle.
The end tap of the third time level winding A3 of described A phase connects the centre tap of the third time level winding B3 of B phase, the end tap of the third time level winding B3 of described B phase connects the centre tap of the third time level winding C3 of C phase, the end tap of the third time level winding C3 of described C phase connects the centre tap of the third time level winding A3 of A phase, realizes θ
3the phase shift of angle.
The end tap of the 4th secondary winding A4 of described A phase connects the centre tap of the 4th secondary winding B4 of B phase, the end tap of the 4th secondary winding B4 of described B phase connects the centre tap of the 4th secondary winding C4 of C phase, the end tap of the 4th secondary winding C4 of described C phase connects the centre tap of the 4th secondary winding A4 of A phase, realizes θ
4the phase shift of angle.
The centre tap of each secondary winding is then according to phase angle θ
1, θ
2, θ
3and θ
4phase shift requirement, arranges the different numbers of turn of distance head end tap.
The head end tap of the first secondary winding of described A phase, B phase, C phase is connected to the first rectification module 31;
The head end tap of the second subprime winding of described A phase, B phase, C phase is connected to the second rectification module 32;
Described A phase, B phase, C phase third time level winding head end tap be connected to the 3rd rectification module 33;
The head end tap of the 4th secondary winding of described A phase, B phase, C phase is connected to the 4th rectification module 34.
Described the first rectification module 31, second rectification module 32, the 3rd rectification module 33 and the 4th rectification module 34 can be connected in series output in the manner illustrated in fig. 5, or are connected in parallel output in mode shown in Fig. 6.
Described each winding forms by the some metal sheetings be wound on iron core column 12 are stacking respectively, this metal sheeting is the strip of wound core column 12, between adjacent metal compressing tablet, there is part in electrical contact, outside the part in electrical contact of adjacent metal compressing tablet, part is insulated from each other, and the metal sheeting described in the present embodiment is silicon steel sheet.
As shown in Figure 7, preferred embodiment two of the present invention:
The difference of itself and above-described embodiment one is, described transformer framework 11 comprises nine iron core columns 12, and described A phase winding, B phase winding, C phase winding iron core column 12 is separately three.
Above-mentioned preferred implementation should be considered as illustrating of the application's scheme implementation mode, allly to duplicate with the application's scheme, technology that is approximate or that make based on this is deduced, replaces, improvement etc., all should be considered as the protection range of this patent.
Claims (7)
1. a heterogeneous multi-pulse rectification transformer, comprise transformer framework and winding, described winding comprises A phase winding, B phase winding and C phase winding, described transformer framework comprises the iron core column of corresponding each phase winding, it is characterized in that: the proportional spacing respectively by N: N+1 in the middle of described A phase winding, B phase winding and C phase winding arranges simple winding and secondary winding, N is natural number; Described each secondary winding has head end tap, end tap and at least one centre tap, and each secondary winding is connected to rectification module respectively and exports.
2. heterogeneous multi-pulse rectification transformer according to claim 1, is characterized in that: comprise the first secondary winding of sequence interval setting, the first simple winding, second subprime winding, the second simple winding in the middle of described A phase winding, B phase winding and C phase winding respectively, organize winding, the 3rd simple winding and the 4th secondary winding for the third time;
Wherein, first secondary winding of described A phase winding, first secondary winding of B phase winding and first level winding switching to the first rectification module of C phase winding, the second subprime winding of described A phase winding, the second subprime winding of B phase winding and second subprime winding switching to the second rectification module of C phase winding, the third time level winding of described A phase winding, B phase winding third time level winding and C phase winding third time level winding switching to the 3rd rectification module, 4th secondary winding of described A phase winding, 4th secondary winding of B phase winding and the 4th secondary winding of C phase winding are connected to the 4th rectification module,
Described first, second, third and fourth rectification module connects output in serial or parallel connection mode.
3. heterogeneous multi-pulse rectification transformer according to claim 2, is characterized in that: after described A phase, B phase and C phase winding the first simple winding separately, the second simple winding and the 3rd simple winding are connected successively, and each phase presses Δ type again or wye connection connects.
4. heterogeneous multi-pulse rectification transformer according to claim 3, it is characterized in that: centre tap is connected by Δ type or wye connection with end tap with the first secondary winding of C phase by the first secondary winding of described A phase, the first secondary winding of B phase, and each head end tap is connected to the first rectification module; Centre tap is connected by Δ type or wye connection with end tap with the second subprime winding of C phase by the second subprime winding of described A phase, the second subprime winding of B phase, and each head end tap is connected to the second rectification module; Centre tap is connected by Δ type or wye connection with end tap with the third time level winding of C phase, and each head end tap is connected to the 3rd rectification module by the third time level winding of described A phase, the third time level winding of B phase; Centre tap is connected by Δ type or wye connection with end tap with the 4th secondary winding of C phase, and each head end tap is connected to the 4th rectification module by the 4th secondary winding of described A phase, the 4th secondary winding of B phase.
5. the heterogeneous multi-pulse rectification transformer according to claim 1-4 any one, it is characterized in that: described each winding forms by the some metal sheetings be wound on iron core column are stacking respectively, this metal sheeting is the strip of wound core column, has part in electrical contact between adjacent metal compressing tablet.
6. heterogeneous multi-pulse rectification transformer according to claim 1, is characterized in that: described A phase winding, B phase winding, C phase winding iron core column is separately at least one.
7. heterogeneous multi-pulse rectification transformer according to claim 6, is characterized in that: described A phase winding, B phase winding, C phase winding iron core column is separately three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510595225.0A CN105206401A (en) | 2015-09-17 | 2015-09-17 | Multiphase multi-pulse wave rectifier transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510595225.0A CN105206401A (en) | 2015-09-17 | 2015-09-17 | Multiphase multi-pulse wave rectifier transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105206401A true CN105206401A (en) | 2015-12-30 |
Family
ID=54954017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510595225.0A Pending CN105206401A (en) | 2015-09-17 | 2015-09-17 | Multiphase multi-pulse wave rectifier transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105206401A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107507699A (en) * | 2016-11-04 | 2017-12-22 | 王奉瑾 | A kind of multipath magnetic circuit phase-shifting transformer |
| CN108364764A (en) * | 2018-02-08 | 2018-08-03 | 涂发明 | Cross complementary formula high ferro tractive transformer |
| CN109962630A (en) * | 2017-12-26 | 2019-07-02 | 天津市大千机电科技发展有限公司 | 18 pulse wave asymmetrical Y shape of three-phase exports winding phase-shifting commutation device |
| GB2579193A (en) * | 2018-11-22 | 2020-06-17 | Murata Manufacturing Co | Multi-phase shift transformer based AC-DC converter |
| CN112289570A (en) * | 2020-10-28 | 2021-01-29 | 广东电网有限责任公司广州供电局 | Edge-extended triangular autotransformer |
| CN117809938A (en) * | 2023-12-04 | 2024-04-02 | 保定天威集团特变电气有限公司 | From many pulse wave rectifier transformer of taking harmonic elimination function |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3535617A (en) * | 1968-02-02 | 1970-10-20 | Lincoln Electric Co | Power source including alternating current transformer having output voltage adjustable in small increments |
| JPH0479306A (en) * | 1990-07-23 | 1992-03-12 | Fuji Electric Co Ltd | Transformer for industrial use |
| CN201904191U (en) * | 2010-10-20 | 2011-07-20 | 特变电工股份有限公司 | Rectifier transformer |
| CN102881435A (en) * | 2012-09-05 | 2013-01-16 | 尤大千 | Three-phase 24-pulse single-output winding phase-shifting rectifier transformer |
| CN103035378A (en) * | 2012-11-28 | 2013-04-10 | 王奉瑾 | Interlayer type transformer |
| CN103608878A (en) * | 2011-06-10 | 2014-02-26 | 株式会社精电制作所 | High-frequency transformer |
| CN104361982A (en) * | 2014-10-24 | 2015-02-18 | 南京航空航天大学 | 12-pulse-wave self-coupling phase shift rectifier transformer |
-
2015
- 2015-09-17 CN CN201510595225.0A patent/CN105206401A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3535617A (en) * | 1968-02-02 | 1970-10-20 | Lincoln Electric Co | Power source including alternating current transformer having output voltage adjustable in small increments |
| JPH0479306A (en) * | 1990-07-23 | 1992-03-12 | Fuji Electric Co Ltd | Transformer for industrial use |
| CN201904191U (en) * | 2010-10-20 | 2011-07-20 | 特变电工股份有限公司 | Rectifier transformer |
| CN103608878A (en) * | 2011-06-10 | 2014-02-26 | 株式会社精电制作所 | High-frequency transformer |
| CN102881435A (en) * | 2012-09-05 | 2013-01-16 | 尤大千 | Three-phase 24-pulse single-output winding phase-shifting rectifier transformer |
| CN103035378A (en) * | 2012-11-28 | 2013-04-10 | 王奉瑾 | Interlayer type transformer |
| CN104361982A (en) * | 2014-10-24 | 2015-02-18 | 南京航空航天大学 | 12-pulse-wave self-coupling phase shift rectifier transformer |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107507699A (en) * | 2016-11-04 | 2017-12-22 | 王奉瑾 | A kind of multipath magnetic circuit phase-shifting transformer |
| CN109962630A (en) * | 2017-12-26 | 2019-07-02 | 天津市大千机电科技发展有限公司 | 18 pulse wave asymmetrical Y shape of three-phase exports winding phase-shifting commutation device |
| CN109962630B (en) * | 2017-12-26 | 2021-03-16 | 天津市大千机电科技发展有限公司 | Three-phase 18-pulse asymmetric Y-shaped output winding phase-shifting rectifying device |
| CN108364764A (en) * | 2018-02-08 | 2018-08-03 | 涂发明 | Cross complementary formula high ferro tractive transformer |
| GB2579193A (en) * | 2018-11-22 | 2020-06-17 | Murata Manufacturing Co | Multi-phase shift transformer based AC-DC converter |
| GB2579193B (en) * | 2018-11-22 | 2021-12-15 | Murata Manufacturing Co | Multi-phase shift transformer based AC-DC converter |
| CN112289570A (en) * | 2020-10-28 | 2021-01-29 | 广东电网有限责任公司广州供电局 | Edge-extended triangular autotransformer |
| CN117809938A (en) * | 2023-12-04 | 2024-04-02 | 保定天威集团特变电气有限公司 | From many pulse wave rectifier transformer of taking harmonic elimination function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105206401A (en) | Multiphase multi-pulse wave rectifier transformer | |
| EP2587658A3 (en) | Series-connected multi-level power conversion device | |
| CN201048075Y (en) | 18 pulse wave commutator transformer | |
| CN104361982A (en) | 12-pulse-wave self-coupling phase shift rectifier transformer | |
| CN101098107B (en) | High-voltage frequency converter of power unit series | |
| WO2013036734A3 (en) | Isolated switch-mode dc/dc converter with sine wave transformer voltages | |
| CN204348495U (en) | A kind of polysilicon dry-type transformer | |
| CN202997949U (en) | Twenty-four pulse wave rectification transformer | |
| CN103594237B (en) | A kind of 18 pulse phase shifting rectifier transformers | |
| CN201750348U (en) | Multi-level high-voltage transformer rectifier unit | |
| CN102881435A (en) | Three-phase 24-pulse single-output winding phase-shifting rectifier transformer | |
| RU2015135500A (en) | ELECTRIC POWER CONVERTER WITH INTERRUPTION | |
| CN103862158A (en) | Manual intermediate frequency resistance welding control cabinet | |
| CN204857403U (en) | High -power high -voltage frequency converters device is with oily 54 pulse wave frequency conversion transformers of formula | |
| JPH02123967A (en) | Dc-dc converter | |
| CN207009256U (en) | A kind of single device body low pressure alternating expression arranges 12 pulse wave rectifier transformers | |
| CN203242471U (en) | Valve side winding wire outgoing structure of convertor transformer | |
| CN202093954U (en) | Phase-shift rectifier transformer and serial-connection topology frequency converter | |
| CN208538646U (en) | A kind of convertor transformer | |
| CN106169007A (en) | Method calculated by a kind of sensing filtering converter power transformer harmonic current transferometer | |
| CN103065779A (en) | Three-phase 24 pulse wave double-Y-shaped output winding phase-shifting rectifier transformer | |
| CN104882259A (en) | Phase-shifting winding type voltage-regulating rectifier transformer and voltage regulating method thereof | |
| CN206179646U (en) | Heterogeneous many magnetic circuits transformer | |
| CN204732263U (en) | Magnetic element | |
| CN204927002U (en) | Move phase winding pressure regulating rectifier transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Yongjun Inventor after: Zhao Zhiyuan Inventor after: Yan Xiao Inventor before: Wang Fengjin Inventor before: Dai Xueqing |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20170527 Address after: 201999 room, No. 1508, Youyi Road, Shanghai, Baoshan District, F269, 101 Applicant after: Shanghai Amperex Technology Limited Address before: 528400, No. two, Xingye Road, Torch Development Zone, Guangdong, Zhongshan Province, China, four Applicant before: Wang Fengjin |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151230 |