CN115386883B - Mounting structure of flow passage type ship body sacrificial anode - Google Patents
Mounting structure of flow passage type ship body sacrificial anode Download PDFInfo
- Publication number
- CN115386883B CN115386883B CN202211147659.0A CN202211147659A CN115386883B CN 115386883 B CN115386883 B CN 115386883B CN 202211147659 A CN202211147659 A CN 202211147659A CN 115386883 B CN115386883 B CN 115386883B
- Authority
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- China
- Prior art keywords
- sacrificial anode
- coaming
- runner
- flow passage
- base
- Prior art date
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- 239000013535 sea water Substances 0.000 claims abstract description 19
- 238000009434 installation Methods 0.000 claims abstract description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 15
- 239000010935 stainless steel Substances 0.000 claims description 15
- 239000003292 glue Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000004593 Epoxy Substances 0.000 claims 1
- 239000004568 cement Substances 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 27
- 238000005260 corrosion Methods 0.000 abstract description 13
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 238000004210 cathodic protection Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229920006333 epoxy cement Polymers 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
- C23F2213/20—Constructional parts or assemblies of the anodic or cathodic protection apparatus
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
- C23F2213/30—Anodic or cathodic protection specially adapted for a specific object
- C23F2213/31—Immersed structures, e.g. submarine structures
Abstract
The invention discloses a mounting structure of a flow passage type ship body sacrificial anode, which comprises a flow passage provided with an opening, a base coaming arranged outside the flow passage and enclosing the opening, and a top plate for sealing the opening at the top of the base coaming, wherein the base coaming is internally provided with a coaming connected with the top plate, the side edge of the coaming is hollowed out, the bottom of the coaming is provided with a bottom sealing plate with the shape consistent with that of the flow passage plate near the opening of the flow passage, a gap is reserved between the bottom sealing plate and the opening of the flow passage, and a sacrificial anode connected with the bottom sealing plate is also arranged in the coaming. The invention has simple structure, convenient installation and replacement, low cost-effectiveness ratio and wide adaptability, when the ship sails, seawater can be filled in the runner and seep into and fill the base coaming, the runner connected with the base coaming and the sacrificial anode in the coaming form a micro battery, and the invention is different from the square sacrificial anode conventionally arranged on the underwater outer plate of the ship body and protruding outwards, has stealth, not only maintains the smoothness of the runner, but also is beneficial to the anti-corrosion protection of the ship body cathode in the runner area.
Description
Technical Field
The invention relates to an anti-corrosion device for a ship propeller tunnel, in particular to a mounting structure of a flow passage type ship body sacrificial anode.
Background
Existing propulsion vessels (e.g., shallow draft vessels, jet pump high speed vessels, vessels with side thrust from fore to aft, etc.) have tunnels (i.e., runners, hereinafter runners) near the propeller to ensure passage of seawater for achieving desired vessel propulsion. Because seawater has high corrosiveness, the conventional metal ship body is generally preserved by adopting a coating and arranging a sacrificial anode (square anode) in a flow passage in a cathodic protection mode, however, the flow rate of the seawater at the flow passage is several times higher than that of other parts of the ship body, if the square anode is arranged at the flow passage, the flow passage is outwards protruded to cause fairing mutation of the flow passage, so that the seawater has a water retaining effect, the sacrificial anode is impacted by high-speed seawater, the corrosion effect is easily degraded and accelerated to be consumed, the corrosion effect is reduced, residues can damage a propeller, and the ship propelling performance is influenced; if no sacrificial anode is arranged, the runner is easy to corrode, so that the flow velocity and corrosion resistance of the current runner area are always difficult to balance. For a high-speed ship with a jet pump arranged individually, if the runner is made of expensive nonmetallic materials, the runner and a metal ship body cannot be directly welded.
Disclosure of Invention
The invention provides a mounting structure of a flow channel type ship body sacrificial anode, which has a simple structure and can simultaneously consider 'flow velocity and corrosion resistance'.
The invention relates to a mounting structure of a flow passage type ship body sacrificial anode, which comprises a flow passage with an opening, a base coaming arranged outside the flow passage and enclosing the opening, and a top plate for sealing the opening at the top of the base coaming, wherein the base coaming is internally provided with a coaming connected with the top plate, the side edge of the coaming is hollowed out, the bottom of the coaming is provided with a bottom sealing plate with the shape consistent with that of the flow passage plate near the opening of the flow passage, a gap is reserved between the bottom sealing plate and the opening of the flow passage, and a sacrificial anode connected with the bottom sealing plate is also arranged in the coaming.
The installation structure of the flow passage type ship body sacrificial anode ensures the tightness of the flow passage and prevents seawater from entering the cabin by sealing and fixing the top plate and the base coaming; the shape of the bottom sealing plate is consistent with that of the runner plate near the opening of the runner, and a gap is reserved between the bottom sealing plate and the edge of the opening, so that the flow channel smoothness and the permeability of seawater flowing into the base coaming from the gap are ensured; the side edges of the coaming are hollowed out, so that seawater can flow into the coaming conveniently, and the sacrificial anode can be mounted and replaced conveniently; the mounting structure of the sacrificial anode is arranged on the side of the runner without protruding outwards, is different from a square sacrificial anode which is conventionally arranged on an underwater outer plate of the ship body and protruding outwards, has stealth, maintains the smoothness of the runner, and is beneficial to the corrosion protection of the ship body cathode in the runner area. The invention has simple structure, simple installation and replacement, low cost-effectiveness ratio and wide adaptability, when the ship sails, seawater can be filled in the flow channel and seep into and fill the base coaming, the flow channel connected with the base coaming and the sacrificial anode in the coaming form a micro battery, and the aim of protecting the cathode of the peripheral flow channel hull structure by sacrificing the sacrificial anode arranged in the coaming is fulfilled.
Drawings
FIG. 1 is a schematic view of a mounting structure of a flow channel type hull sacrificial anode.
Fig. 2 is a top view of a mounting structure for a flow channel type hull sacrificial anode.
FIG. 3 is a schematic view of the installation structure of a flow channel type hull sacrificial anode.
Detailed Description
As shown in figures 1-3, the installation structure of the flow channel type ship body sacrificial anode comprises a flow channel 1 provided with an opening, a base coaming 2 arranged outside the flow channel and enclosing the opening, and a top plate 3 for sealing the opening at the top of the base coaming, wherein a coaming 4 connected with the top plate is arranged in the base coaming, the side edge of the coaming is hollowed out, a bottom sealing plate 5 consistent with the shape of a flow channel plate near the opening of the flow channel is arranged at the bottom of the coaming, a gap is reserved between the bottom sealing plate and the opening of the flow channel, and a sacrificial anode 6 connected with the bottom sealing plate is also arranged in the coaming. The top plate and the base coaming are fixed in a sealing way, so that the tightness of the flow channel is ensured, and seawater is prevented from entering the cabin; the shape of the bottom sealing plate is consistent with that of the runner plate near the opening of the runner, and a gap is reserved between the bottom sealing plate and the edge of the opening, so that the flow channel smoothness and the permeability of seawater flowing into the base coaming from the gap are ensured; the side edges of the coaming are hollowed out, so that seawater can flow into the coaming conveniently, and the sacrificial anode can be mounted and replaced conveniently; the mounting structure of the sacrificial anode is arranged on the side of the flow channel without protruding outwards, is different from a square sacrificial anode which is conventionally arranged on an underwater outer plate of the ship body and protruding outwards, has stealth, maintains the smoothness of the flow channel, is beneficial to the corrosion protection of the ship body cathode in the flow channel area, simply and effectively solves the problem that the flow velocity and corrosion resistance cannot be simultaneously considered, and realizes the corrosion protection of the cathode of the flow channel. The invention has simple structure, simple installation and replacement, low cost-effectiveness ratio and wide adaptability, when the ship sails, seawater can be filled in the flow channel and seep into and fill the base coaming, the flow channel connected with the base coaming and the sacrificial anode in the coaming form a micro battery, and the aim of protecting the cathode of the peripheral flow channel hull structure by sacrificing the sacrificial anode arranged in the coaming is fulfilled.
Conventional steel/aluminum hull sacrificial anode cathodic protection principle: in principle, as long as electrons on the ship body (iron/aluminum) are increased, the ship body (iron/aluminum) ions are not dissolved, and the cathode protection function is realized; the steel ship body is provided with a zinc block sacrificial anode, the zinc block is easily dissolved by seawater, electrons on the ship body are increased, and the ship body (iron/aluminum) ions are not dissolved, so that the cathode protection effect is realized.
The upper flow channel type sacrificial anode device realizes the anticorrosion protection of the flow channel cathode in the following way: when the ship sails, the coaming is filled with seawater to dissolve the sacrificial anode, positive ions are released around the sacrificial anode, and electrons are sequentially transmitted to the runner structure through the anode core, the bottom sealing plate, the coaming, the top plate, the locating pins and the base coaming, so that the top plate, the base coaming and the runner are fully covered with electrons to become cathodes, and metal ions of the top plate and the runner body are not dissolved or less dissolved, so that the cathode anti-corrosion protection effect is achieved.
The base shroud extends outwardly of an annular base panel 7 for securing the top panel. The area that base panel increase base bounding wall and roof were laminated is favorable to convenient fixed mounting roof. The base panel and the base coaming can be formed by welding, or the top of the base coaming extends outwards to form the integrally formed base panel.
The base coaming and the base panel are made of the same metal material as the runner, such as aluminum, steel and the like, and the same metal material is favorable for welding, fixing and forming.
The base panel and the top plate are provided with matched bolt holes, one bolt hole of the base panel is fixedly welded with a positioning bolt 8, and the upwards extending part of the positioning bolt is inserted into the bolt hole matched with the positioning bolt of the top plate; the rest bolt holes are used for fixing the base panel and the top plate through the bolt assemblies 9, the detachable structure of the bolt assemblies can be used for observing whether marine garbage exists in the flow channel or not by opening the top plate, and in addition, the positioning bolts are arranged on the base panel, so that the top plate can be quickly placed on the base panel for positioning and fixing installation.
The annular sealing gasket glue 10 is arranged between the base panel and the top plate, the sealing gasket glue is a gasket with long service life, elasticity and good sealing performance, and the sealing gasket glue is placed between the base panel and the top plate and is fixed through a bolt assembly, so that the sealing performance of a flow channel is ensured.
The bolt assembly 9 includes stainless steel bolts 901 penetrating through bolt holes of the base panel and the top plate, insulating sleeves 902 sleeved on the stainless steel bolts and insulated from the base panel and the top plate, stainless steel gaskets respectively arranged on the surfaces of the base panel and the top plate, and stainless steel nuts 903 for screwing or unscrewing the base panel and the top plate. The insulating sleeve can be used for preventing the stainless steel bolt from being corroded by dissimilar metal galvanic couple with the top plate and the base panel.
The middle part fixed mounting of end shrouding has threaded installation stick 11, and sacrificial anode 6 includes cake positive pole body 601, cake positive pole body middle part is reserved and is supplied the round hole that the installation stick passed, and this internal embedded positive pole core 602 of installing of cake positive pole is equipped with the stainless steel nut and the stainless steel gasket of fixing the cake positive pole body on the end shrouding of screwing, still fill the epoxy cement 603 that holds the separation sea water in the round hole. The material of the sacrificial anode can be zinc blocks or high-efficiency aluminum anodes, and the size of the sacrificial anode is determined by measuring the surface area of the protection runner according to the metal material of the ship runner; the anode core embedded in the round cake anode body is pressed into a butterfly shape through square plate metal, and the round cake anode body is formed by drilling in the middle. The threaded mounting rod is identical to the bottom sealing plate in material quality, and the cake anode body and the embedded anode core are integrally cast and formed through modeling; when the sacrificial anode is fixedly arranged on the bottom sealing plate, firstly, a threaded mounting rod is welded in the center of the bottom sealing plate, and other exposed parts are subjected to integral anti-corrosion coating except for retaining the metal natural color at the positions of the mounting rod, the positioning pin and bolt holes of the top plate matched with the positioning pin; finally, a sacrificial anode body, a stainless steel gasket and a stainless steel nut are sequentially placed at the mounting rod, the mounting rod is screwed down, epoxy cement is filled, seawater can be effectively prevented from entering the mounting rod, and dissimilar metal galvanic corrosion of the nut and the anode core is prevented.
The opening of the runner is arranged at the top of the runner, so that whether the runner has marine garbage or not can be conveniently observed at ordinary times for cleaning, or whether the shaft oar is abnormal or not can be observed, and the maintenance or repair can be timely carried out.
Claims (7)
1. The utility model provides a mounting structure of runner type hull sacrificial anode, its characterized in that, including being equipped with open-ended runner (1), setting up base bounding wall (2) and sealed base bounding wall open-ended roof (3) outside the runner with the opening, be equipped with bounding wall (4) that link to each other with the roof in the base bounding wall, bounding wall (4) side fretwork, bottom seal board (5) consistent with runner plate shape near runner opening are installed to the bottom of bounding wall (4), leave the clearance between the opening of bottom seal board and runner, still install sacrificial anode (6) that are connected with the bottom seal board in bounding wall (4), the middle part fixed mounting of bottom seal board has threaded installation stick (11), sacrificial anode (6) include cake positive pole body (601), cake positive pole body middle part is reserved and is equipped with the round hole that supplies the installation stick to pass, and this embedded positive pole core (602) of installing stick threaded position is equipped with the stainless steel nut and the stainless steel glue pad that fixes the cake positive pole body on the bottom seal board, the round hole is interior still to be filled with the epoxy mud (603) of sea water.
2. A mounting arrangement for a flow passage type hull sacrificial anode according to claim 1, characterised in that the base coaming extends outwardly of an annular base panel (7) for securing the top plate.
3. The structure according to claim 2, wherein the base coaming and the base panel are made of the same metal material as the runner.
4. The installation structure of the flow passage type hull sacrificial anode according to claim 2, wherein the base panel and the top plate are provided with matched bolt holes, a positioning bolt (8) is welded and fixed in one bolt hole of the base panel, and the upwards extending part of the positioning bolt is inserted into the bolt hole matched with the positioning bolt of the top plate; the rest bolt holes are used for fixing the base panel and the top plate through the bolt assemblies (9).
5. The mounting structure of the flow passage type hull sacrificial anode according to claim 4, wherein an annular gasket cement (10) is provided between the base panel and the top plate.
6. The mounting structure of the flow passage type hull sacrificial anode according to claim 4, wherein the bolt assembly (9) comprises stainless steel bolts (901) penetrating through bolt holes of the base panel and the top plate, insulating sleeves (902) covering the stainless steel bolts to insulate the base panel and the top plate, and stainless steel gaskets disposed on surfaces of the base panel and the top plate, respectively, stainless steel nuts (903) for screwing and unscrewing the base panel and the top plate.
7. The mounting structure of a flow channel type hull sacrificial anode according to claim 1, wherein the opening of the flow channel is provided at the top of the flow channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211147659.0A CN115386883B (en) | 2022-09-21 | 2022-09-21 | Mounting structure of flow passage type ship body sacrificial anode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211147659.0A CN115386883B (en) | 2022-09-21 | 2022-09-21 | Mounting structure of flow passage type ship body sacrificial anode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115386883A CN115386883A (en) | 2022-11-25 |
| CN115386883B true CN115386883B (en) | 2024-03-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211147659.0A Active CN115386883B (en) | 2022-09-21 | 2022-09-21 | Mounting structure of flow passage type ship body sacrificial anode |
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| Country | Link |
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| CN (1) | CN115386883B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032308A (en) * | 2014-06-24 | 2014-09-10 | 中国船舶重工集团公司第七二五研究所 | Anti-corrosion anti-fouling integrated control method for flow channel system of water-jet propeller |
| WO2018095548A1 (en) * | 2016-11-28 | 2018-05-31 | Schottel Gmbh | Nozzle of a ship propeller |
| CN211543803U (en) * | 2019-12-26 | 2020-09-22 | 武汉船舶设计研究院有限公司 | Ship sacrificial anode block mounting structure |
| CN112323072A (en) * | 2020-12-20 | 2021-02-05 | 江龙船艇科技股份有限公司 | Sacrificial anode structure for high-speed metal ship |
| CN212533135U (en) * | 2020-05-09 | 2021-02-12 | 蓬莱中柏京鲁船业有限公司 | Sacrificial anode protection device |
| CN215887236U (en) * | 2021-10-26 | 2022-02-22 | 河南盛世达防腐工程有限公司 | Novel sacrificial anode structure in seawater |
-
2022
- 2022-09-21 CN CN202211147659.0A patent/CN115386883B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032308A (en) * | 2014-06-24 | 2014-09-10 | 中国船舶重工集团公司第七二五研究所 | Anti-corrosion anti-fouling integrated control method for flow channel system of water-jet propeller |
| WO2018095548A1 (en) * | 2016-11-28 | 2018-05-31 | Schottel Gmbh | Nozzle of a ship propeller |
| CN211543803U (en) * | 2019-12-26 | 2020-09-22 | 武汉船舶设计研究院有限公司 | Ship sacrificial anode block mounting structure |
| CN212533135U (en) * | 2020-05-09 | 2021-02-12 | 蓬莱中柏京鲁船业有限公司 | Sacrificial anode protection device |
| CN112323072A (en) * | 2020-12-20 | 2021-02-05 | 江龙船艇科技股份有限公司 | Sacrificial anode structure for high-speed metal ship |
| CN215887236U (en) * | 2021-10-26 | 2022-02-22 | 河南盛世达防腐工程有限公司 | Novel sacrificial anode structure in seawater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115386883A (en) | 2022-11-25 |
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Address after: 523591 building 11, No.5 Luhu Road, Yuexiu District, Guangzhou City, Guangdong Province Applicant after: Guangzhou Ship and Ocean Engineering Design and Research Institute (the 65th Research Institute of China State Shipbuilding Corporation Corp.) Address before: 523591 building 11, No.5 Luhu Road, Yuexiu District, Guangzhou City, Guangdong Province Applicant before: GUANGZHOU SHIPBUILDING AND OCEAN ENGINEERING DESIGN Research Institute (THE 605TH RESEARCH INSTITUTE OF CHINA STATE SHIPBUILDING Corp.,Ltd.) |
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