CN204131417U - A kind of flexible DC power transmission engineering current conversion station - Google Patents
A kind of flexible DC power transmission engineering current conversion station Download PDFInfo
- Publication number
- CN204131417U CN204131417U CN201420636206.9U CN201420636206U CN204131417U CN 204131417 U CN204131417 U CN 204131417U CN 201420636206 U CN201420636206 U CN 201420636206U CN 204131417 U CN204131417 U CN 204131417U
- Authority
- CN
- China
- Prior art keywords
- room
- flexible
- conversion station
- current conversion
- power transmission
- 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.)
- Active
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 31
- 230000005540 biological transmission Effects 0.000 title claims abstract description 28
- 238000009499 grossing Methods 0.000 claims abstract description 12
- 230000000295 complement effect Effects 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims description 6
- 230000001413 cellular effect Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 3
- 230000005670 electromagnetic radiation Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
- E04H5/02—Buildings or groups of buildings for industrial purposes, e.g. for power-plants or factories
- E04H5/04—Transformer houses; Substations or switchgear houses
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The utility model relates to a kind of flexible DC power transmission engineering current conversion station, and it comprises associating building, and flexible DC power transmission engineering current conversion station is arranged in associating building; Be positioned at the horizontal wall in associating architecture indoor side and Indoor DC Field is set, smoothing reactor unit and direct current switch elements are installed; The longitudinal wall in both sides of its complementary space of associating architecture indoor is respectively arranged with functional compartments, each functional compartments is made up of brachium pontis reactor room and the valve Room, brachium pontis reactor room is for installing brachium pontis reactor unit, the valve Room is for installing converter valve unit, be set to control room between two functional compartments, Control protection system unit is installed; The roofing of associating building, ground and wall are provided with metallic shield net and fire compartment wall, form Faraday cage.The utility model provides a kind of and can effectively prevent each unit in current conversion station from producing the flexible DC power transmission engineering current conversion station of electromagnetic interference, can be widely used in flexible direct-current transmission field.
Description
Technical field
The utility model relates to a kind of current conversion station, particularly about a kind of flexible DC power transmission engineering current conversion station applied in flexible direct-current transmission field.
Background technology
Conventional high-tension HVDC Transmission Technology adopts the semiconductor device (as thyristor) of half control type (can not certainly can turn off from conducting) to carry out AC-DC conversion, AC electric power systems need be relied on to assist cutoff thyristor to its external voltage provided, guarantee that AC-DC conversion is normally carried out.Flexible DC power transmission is a kind of VSC-HVDC technology outside conventional high-tension HVDC Transmission Technology, the feature that it is different from conventional high-tension HVDC Transmission Technology is that it adopts the semiconductor device (such as IGBT) of full-control type (can from conducting and shutoff) to carry out AC-DC conversion, Technology of HVDC based Voltage Source Converter can carry out the control of active power, reactive power, to the strong and weak no requirement (NR) of the AC system at two ends.
But according to flexible direct current engineering feature, its distinctive brachium pontis reactor unit is set in current conversion station, many level converter valve unit; In addition; smoothing reactor, converter transformer, direct current change over switch, the Control protection system unit consistent with conventional high-tension direct current are set; these units can produce the electromagnetic wave of different frequency; interference is produced to building external environment condition and adjacent equipment, flexible DC power transmission engineering is impacted.
Summary of the invention
For the problems referred to above, the purpose of this utility model is to provide a kind of flexible DC power transmission engineering current conversion station effectively preventing each unit generation electromagnetic interference in current conversion station.
For achieving the above object, the utility model takes following technical scheme: a kind of flexible DC power transmission engineering current conversion station, is characterized in that: it comprises associating building, and described flexible DC power transmission engineering current conversion station is arranged on describedly combines in building; Be positioned at the horizontal wall in described associating architecture indoor side and be provided with Indoor DC Field, smoothing reactor unit and direct current switch elements are arranged in described Indoor DC Field; The longitudinal wall in both sides being positioned at described its complementary space of associating architecture indoor is respectively arranged with the functional compartments for installing brachium pontis reactor unit and converter valve unit, control room is being set between functional compartments, by Control protection system cellular installation in described control room described in two; Be positioned at the described horizontal wall of building opposite side of combining outdoor, longitudinal separation is provided with some fire compartment walls, in the space that converter transformer cellular installation is formed between adjacent two described fire compartment walls.
Each described functional compartments is made up of brachium pontis reactor room and the valve Room, described brachium pontis reactor room and the described valve Room are longitudinally arranged, described brachium pontis reactor room is near the horizontal wall being provided with described fire compartment wall side, the described valve Room is near described Indoor DC Field side, described brachium pontis reactor is indoor for installing described brachium pontis reactor unit, for installing described converter valve unit in the described valve Room.
Fire compartment wall described in each adopts concrete to make.
Described roofing of combining building is provided with metallic shield net and described fire compartment wall, ground or underground are also provided with described metallic shield net, each wall of described associating architecture indoor is also all provided with described metallic shield net and described fire compartment wall, described metallic shield net on described roofing, ground and wall is welded into a metal hexahedron, forms Faraday cage.
When described ground arranges described metallic shield net, described ground is also provided with described fire compartment wall.
The utility model is owing to taking above technical scheme, it has the following advantages: 1, the utility model is owing to being all placed in associating building by the armamentarium of current conversion station, therefore the interference that ambient weather factor is run equipment can effectively be reduced, electrical distance between energy reduction equipment, thus make each electric equipment compact Layout, reduce and take up an area.2, the utility model is owing to becoming a metal Faraday cage by whole current conversion station architectural design, therefore effectively can prevent from combining electromagnetic interference in each room of building to room external radiation, also the electromagnetic wave outside each room can be effectively suppressed to enter this room, combine each room in building and can not be subject to the electromagnetic interference in other rooms, and associating building integral can prevent indoor electromagnetic wave outside from propagating, outdoor electromagnetic interference also can be prevented.In sum, the utility model can be widely used in flexible direct-current transmission field.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is associating building structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.
As shown in Figure 1 and Figure 2, the utility model provides a kind of flexible DC power transmission engineering current conversion station, and it comprises associating building 1, and flexible DC power transmission engineering current conversion station is arranged in associating building 1.Be positioned at the horizontal wall in the indoor side of associating building 1 and be provided with Indoor DC Field 2, smoothing reactor unit 3 and direct current switch elements 4 are arranged in Indoor DC Field 2.The longitudinal wall in both sides being positioned at associating building 1 its complementary space indoor is respectively arranged with the functional compartments 7 for installing brachium pontis reactor unit 5 and converter valve unit 6; between two functional compartments 7, be set to control room 8, Control protection system unit 9 is arranged in control room 8.Be positioned at the horizontal wall of associating building 1 opposite side outdoor, longitudinal separation is provided with some fire compartment walls 10, and converter transformer unit 11 is arranged in the space of formation between adjacent two fire compartment walls 10.
In above-described embodiment, each functional compartments 7 is made up of brachium pontis reactor room 12 and the valve Room 13, and brachium pontis reactor room 12 is longitudinally arranged with the valve Room 13, and brachium pontis reactor room 12 is near the horizontal wall being provided with fire compartment wall 10 side, and the valve Room 13 is near Indoor DC Field 2 side.For installing brachium pontis reactor unit 5 in brachium pontis reactor room 12, for installing converter valve unit 6 in the valve Room 13.
In the various embodiments described above, each fire compartment wall 10 adopts concrete to make, for being kept apart by each converter transformer unit 11 in flexible DC power transmission engineering current conversion station.
In the various embodiments described above, the roofing of combining building 1 is provided with metallic shield net and fire compartment wall, and ground or underground are also provided with metallic shield net, adopt when arranging metallic shield net on the ground, also need to be provided with fire compartment wall on the ground; Each wall of combining building 1 indoor is also all provided with metallic shield net and fire compartment wall.Metallic shield net on roofing, ground and wall is welded into a metal hexahedron, forms Faraday cage.This Faraday cage can effectively prevent electromagnetic interference in each room of associating building 1 to room external radiation, also can effectively suppress the electromagnetic wave outside each room to enter this room.Therefore, combine each room in building 1 and can not be subject to the electromagnetic interference in other rooms, and combine building 1 entirety and can prevent indoor electromagnetic wave outside from propagating, also can prevent outdoor electromagnetic interference.
The method for arranging of the utility model flexible DC power transmission engineering current conversion station comprises the following steps:
1) Indoor DC Field 2, control room 8, fire compartment wall 10, brachium pontis reactor room 12 and the valve Room 13 is provided with combining in building 1.The Region dividing that control room 8 is positioned at associating building 1 is become control area, is positioned at both sides, control area and arranges consistent, be divided into region, pole 1 and region, pole 2.
2) whole control area is set to an independently electromagnetic shielding unit, Control protection system unit 9 is arranged in control area.Because Control protection system unit 9 hardware components comprises more Control protection screen cabinet and some transducers be arranged in other units, containing various types of electronic devices and components in Control protection screen cabinet; Control protection software section is then mounted in the various types of software in hardware system.Therefore, Control protection system unit be subject to external electromagnetic radiation interference, impact run normally, territory, whole control block is set to one independently electromagnetic shielding unit can effectively avoid external electromagnetic radiation to disturb.
3) region, pole 1 is arranged consistent with region, pole 2, is described for region, pole 1:
(1) converter transformer unit 11 and brachium pontis reactor unit 5 layout and be connected: because converter transformer unit 11 and the fire-fighting of brachium pontis reactor unit 5 protect difference and electromagnetic shielding requirements; converter transformer unit 11 and brachium pontis reactor unit 5 adopt apart arrangement; brachium pontis reactor unit 5 is arranged in brachium pontis reactor room 12, and converter transformer unit 11 is arranged in the space that is made up of adjacent two fire compartment walls 10.Brachium pontis reactor unit 5 is connected with converter transformer unit 11 by wire, and wire socket is provided with the horizontal wall of metal screen layer and fire compartment wall through combining building 1.
(2) brachium pontis reactor unit 5 and converter valve unit 6 layout and be connected: converter valve unit 6 comprises opto-electronic conversion in the course of the work, and itself course of work can produce electromagnetic radiation, also electromagnetic interference can be produced in brachium pontis reactor unit 5 course of work, therefore, converter valve unit 6 is arranged in the valve Room 13 adjacent with brachium pontis reactor room 12, wall between brachium pontis reactor room 12 and the valve Room 13 is provided with metallic shield net and fire compartment wall is isolated for electromagnetic wave, and converter valve unit 6 and brachium pontis reactor unit 5 complete electrical connection by wall bushing 14, prevent the electromagnetic radiation produced in brachium pontis reactor unit 5 and converter valve unit 6 course of work from interfering with each other.Like this, both met the as far as possible short electrical attachment requirements of brachium pontis reactor unit 5 and converter transformer unit 11 and converter valve unit 6, met again electromagnetic interference shield requirement.
(3) converter valve unit 6 and smoothing reactor unit 3, direct current switch elements 4 layout and be connected: converter valve unit 6 and smoothing reactor unit 3 apart arrangement, smoothing reactor unit 3 is arranged in the side of Indoor DC Field 2, wall between the valve Room 13 and Indoor DC Field 2 is provided with metallic shield net and fire compartment wall is isolated for electromagnetic wave, converter valve unit 6 and smoothing reactor unit 3 complete electrical connection by wall bushing 14, prevent the electromagnetic radiation produced in converter valve unit 6 and smoothing reactor unit 3 course of work from interfering with each other.Direct current switch elements 4 and smoothing reactor unit 3 are close to and are arranged in Indoor DC Field 2, connect with wire, middle without partition wall.
In sum, the utility model in use, AC electric power systems outside each converter transformer unit 11 difference junction chamber, the sleeve pipe of converter transformer unit 11 stretches in brachium pontis reactor room 12 through the horizontal wall of combining building 1 and be provided with metal screen layer and fire compartment wall, is connected with brachium pontis reactor unit 5.Alternating current is by entering in the valve Room 13 along wall bushing 14 after brachium pontis reactor unit 5, interchange is converted to direct current by converter valve unit 6, Indoor DC Field 2 is entered again by wall bushing 14, after smoothing reactor unit 3 removes clutter, flow out current conversion station by direct current switch elements 4, this process is rectification.In contrast, electric current can flow into from direct current switch elements 4, flows out to AC electric power systems from converter transformer unit 11, and this process is referred to as inversion.
The various embodiments described above are only for illustration of the utility model; the connection of each parts and structure all can change to some extent; on the basis of technical solutions of the utility model; all improvement of carrying out the connection of individual part and structure according to the utility model principle and equivalents, all should not get rid of outside protection range of the present utility model.
Claims (6)
1. a flexible DC power transmission engineering current conversion station, is characterized in that: it comprises associating building, and described flexible DC power transmission engineering current conversion station is arranged on describedly combines in building; Be positioned at the horizontal wall in described associating architecture indoor side and be provided with Indoor DC Field, smoothing reactor unit and direct current switch elements are arranged in described Indoor DC Field; The longitudinal wall in both sides being positioned at described its complementary space of associating architecture indoor is respectively arranged with the functional compartments for installing brachium pontis reactor unit and converter valve unit, control room is being set between functional compartments, by Control protection system cellular installation in described control room described in two; Be positioned at the described horizontal wall of building opposite side of combining outdoor, longitudinal separation is provided with some fire compartment walls, in the space that converter transformer cellular installation is formed between adjacent two described fire compartment walls.
2. a kind of flexible DC power transmission engineering current conversion station as claimed in claim 1, it is characterized in that: each described functional compartments is made up of brachium pontis reactor room and the valve Room, described brachium pontis reactor room and the described valve Room are longitudinally arranged, described brachium pontis reactor room is near the horizontal wall being provided with described fire compartment wall side, the described valve Room is near described Indoor DC Field side, described brachium pontis reactor is indoor for installing described brachium pontis reactor unit, for installing described converter valve unit in the described valve Room.
3. a kind of flexible DC power transmission engineering current conversion station as claimed in claim 1, is characterized in that: fire compartment wall described in each adopts concrete to make.
4. a kind of flexible DC power transmission engineering current conversion station as claimed in claim 2, is characterized in that: fire compartment wall described in each adopts concrete to make.
5. a kind of flexible DC power transmission engineering current conversion station as claimed in claim 1 or 2 or 3 or 4, it is characterized in that: described roofing of combining building is provided with metallic shield net and described fire compartment wall, ground or underground are also provided with described metallic shield net, each wall of described associating architecture indoor is also all provided with described metallic shield net and described fire compartment wall, described metallic shield net on described roofing, ground and wall is welded into a metal hexahedron, forms Faraday cage.
6. a kind of flexible DC power transmission engineering current conversion station as claimed in claim 5, is characterized in that: when arranging described metallic shield net on described ground, described ground is also provided with described fire compartment wall.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410594784.5A CN104283439B (en) | 2014-10-29 | 2014-10-29 | Flexible high voltage direct current transmission project converter station and arrangement method thereof |
| CN201420636206.9U CN204131417U (en) | 2014-10-29 | 2014-10-29 | A kind of flexible DC power transmission engineering current conversion station |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410594784.5A CN104283439B (en) | 2014-10-29 | 2014-10-29 | Flexible high voltage direct current transmission project converter station and arrangement method thereof |
| CN201420636206.9U CN204131417U (en) | 2014-10-29 | 2014-10-29 | A kind of flexible DC power transmission engineering current conversion station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204131417U true CN204131417U (en) | 2015-01-28 |
Family
ID=54696256
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410594784.5A Active CN104283439B (en) | 2014-10-29 | 2014-10-29 | Flexible high voltage direct current transmission project converter station and arrangement method thereof |
| CN201420636206.9U Active CN204131417U (en) | 2014-10-29 | 2014-10-29 | A kind of flexible DC power transmission engineering current conversion station |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410594784.5A Active CN104283439B (en) | 2014-10-29 | 2014-10-29 | Flexible high voltage direct current transmission project converter station and arrangement method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN104283439B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283439A (en) * | 2014-10-29 | 2015-01-14 | 国家电网公司 | Flexible high voltage direct current transmission project converter station and arrangement method thereof |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652864B (en) * | 2015-02-13 | 2017-01-11 | 国家电网公司 | Offshore platform for offshore wind power flexible direct current connecting-in system |
| CN104953860B (en) * | 2015-07-09 | 2018-01-16 | 中国海洋石油总公司 | A kind of container-type flexible direct current change of current valve gear |
| CN106877372B (en) * | 2017-03-01 | 2023-08-18 | 中国电力工程顾问集团中南电力设计院有限公司 | Flexible direct-current back-to-back converter station valve hall arrangement structure |
| CN107919679A (en) * | 2017-12-21 | 2018-04-17 | 中国能源建设集团广东省电力设计研究院有限公司 | Flexible direct current converter station arrangement |
| CN110939302A (en) * | 2018-09-25 | 2020-03-31 | 中国电力工程顾问集团西南电力设计院有限公司 | Flexible direct current valve hall structure |
| CN114093598A (en) * | 2021-11-17 | 2022-02-25 | 广东电网有限责任公司广州供电局 | Flexible straight transformer in sleeve side play room |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758544A (en) * | 2011-04-29 | 2012-10-31 | 上海市电力公司 | Shielding structure for electromagnetic field in valve hall of flexible direct current convertor station |
| CN103872695B (en) * | 2014-03-14 | 2016-01-27 | 中国能源建设集团广东省电力设计研究院有限公司 | The flexible direct current converter station valve Room and DC fields build structure jointly |
| CN103956763B (en) * | 2014-04-01 | 2016-06-29 | 中国能源建设集团广东省电力设计研究院有限公司 | Flexible direct current converter station |
| CN104283439B (en) * | 2014-10-29 | 2017-02-15 | 国家电网公司 | Flexible high voltage direct current transmission project converter station and arrangement method thereof |
-
2014
- 2014-10-29 CN CN201410594784.5A patent/CN104283439B/en active Active
- 2014-10-29 CN CN201420636206.9U patent/CN204131417U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283439A (en) * | 2014-10-29 | 2015-01-14 | 国家电网公司 | Flexible high voltage direct current transmission project converter station and arrangement method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104283439B (en) | 2017-02-15 |
| CN104283439A (en) | 2015-01-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204131417U (en) | A kind of flexible DC power transmission engineering current conversion station | |
| CN105207498B (en) | A kind of single-row valve tower of high voltage direct current transmission converter valve | |
| CN103872695B (en) | The flexible direct current converter station valve Room and DC fields build structure jointly | |
| Fallah et al. | Lightning protection techniques for roof-top PV systems | |
| US20140247539A1 (en) | Enclosure for electrical distribution equipment and electrical distribution apparatus employing the same | |
| CN204885964U (en) | Photovoltaic case becomes with contravariant function of stepping up | |
| CN206442661U (en) | A kind of electromagnetic armouring structure of central air-conditioning switch board | |
| JP2011210810A (en) | Smart grid power generation method and monitoring system therefor | |
| CN202258582U (en) | Extra-high voltage direct-current field post insulator piezometer ring device | |
| CN205407010U (en) | Photovoltaic case is used on plateau | |
| CN203826979U (en) | Flexible direct current converter station valve hall and direct current field combined construction structure | |
| JP2015046952A (en) | Distribution board | |
| Barmada et al. | Impact of nearby lightning on photovoltaic modules converters | |
| CN102345331B (en) | Construction method of solar energy lightning protection facility on building roof | |
| CN204597230U (en) | One is high voltage distribution installation line framework arrangement within doors | |
| CN203774670U (en) | Low-noise vacuum switch cabinet | |
| CN204112527U (en) | A kind of converter station valve hall combined baffle wall of shielded flexible direct current magnetic wave | |
| CN104113974B (en) | One prevents house owed by a citizen near ultra-high-tension power transmission line from producing faradic device | |
| CN207518166U (en) | Power plant 1000kV outlet grade transmitting system mounting structures | |
| CN209496646U (en) | A kind of pressure resistance heat resistanceheat resistant type wire and cable | |
| CN202957351U (en) | Equipotential lightning protection assisting device for small industrial control room | |
| CN204087847U (en) | A kind of abnormity connects busbar | |
| CN205657362U (en) | A converter station | |
| CN106558842A (en) | A kind of 630KVA power transformation boxes and installation foundation | |
| CN203966720U (en) | Iron core reactor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |