CN112211440A - Shielding machine room - Google Patents
Shielding machine room Download PDFInfo
- Publication number
- CN112211440A CN112211440A CN201910634457.0A CN201910634457A CN112211440A CN 112211440 A CN112211440 A CN 112211440A CN 201910634457 A CN201910634457 A CN 201910634457A CN 112211440 A CN112211440 A CN 112211440A
- Authority
- CN
- China
- Prior art keywords
- shielding
- door body
- machine room
- layer
- blocks
- 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
- 230000005855 radiation Effects 0.000 claims abstract description 16
- 230000003471 anti-radiation Effects 0.000 claims description 8
- 239000004567 concrete Substances 0.000 claims description 7
- 238000009423 ventilation Methods 0.000 claims description 6
- 229910000978 Pb alloy Inorganic materials 0.000 claims description 3
- 229910001080 W alloy Inorganic materials 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 9
- 238000010276 construction Methods 0.000 abstract description 7
- 239000010410 layer Substances 0.000 description 34
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000002356 single layer Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 229910052601 baryte Inorganic materials 0.000 description 1
- 239000010428 baryte Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- E04H3/00—Buildings or groups of buildings for public or similar purposes; Institutions, e.g. infirmaries or prisons
- E04H3/08—Hospitals, infirmaries, or the like; Schools; Prisons
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
- E06B5/18—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes against harmful radiation
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B2001/925—Protection against harmful electro-magnetic or radio-active radiations, e.g. X-rays
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Toxicology (AREA)
- Building Environments (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a shielding machine room, relates to the technical field of medical buildings, and can solve the problems of long construction period and low construction efficiency of the shielding machine room caused by complex procedures in the existing shielding machine room construction process. The shielding machine room comprises a wall body and a top plate, wherein at least one part of the wall body and/or the top plate is formed by splicing a plurality of shielding blocks. The invention is used for placing medical equipment with a radiation source.
Description
Technical Field
The invention relates to the technical field of medical construction, in particular to a shielding machine room.
Background
In the current medical technology, during the process of imaging or treating a patient by high-energy rays, because the high-energy rays have radiativity, generally, a shielding machine room is required to be separately constructed for the medical equipment with the radiation source, so as to isolate the medical equipment from the surrounding environment. The shielding machine room in the related art is usually formed by adopting a cast-in-place process and pouring reinforced concrete, and the construction process is complex, so that the construction period of the shielding machine room is long, and the construction efficiency is low.
Disclosure of Invention
The embodiment of the invention provides a shielding machine room, which can shorten the period of building the shielding machine room and improve the building efficiency.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme: the shielding machine room comprises a wall body and a top plate, wherein at least one part of the wall body and/or the top plate is formed by splicing a plurality of shielding blocks.
Optionally, the wall and/or the top plate is a layer, and a radiation leakage prevention structure is arranged at a joint of the adjacent shielding blocks.
Optionally, the wall and/or the ceiling comprise at least a first and a second shielding layer.
Optionally, a leak-proof structure is arranged at the joint of the adjacent shielding blocks in the first shielding layer and/or the second shielding layer;
or the joints of the adjacent shielding blocks in the first shielding layer are blocked by the shielding blocks in the second shielding layer.
Optionally, the shielding room further comprises a shielding door.
Optionally, the shielding door includes a first door body and a second door body, and an anti-radiation structure is disposed at a joint of the first door body and the second door body.
Optionally, the anti-reflection structure is a curved surface, an inclined surface, a stepped surface, a dovetail surface, or a toothed surface.
Optionally, the shield door includes a door body and a base, the base is used for supporting the door body, and the door body includes at least a first door body layer and a second door body layer.
Optionally, at least a portion of the first door body layer and/or the second door body layer is formed by splicing a plurality of shielding blocks.
Optionally, the wall body is provided with a matching portion for connecting with a foundation.
Optionally, the shielding equipment room further includes a ventilation structure for communicating the inside and the outside of the shielding equipment room.
Optionally, the shielded room further comprises a bottom plate, and the ventilation structure is disposed in the bottom plate.
Optionally, the material of the shielding block is: concrete, lead, tungsten alloys, lead alloys.
Optionally, adjacent shielding blocks in the plurality of shielding blocks are connected by a connecting piece.
According to the shielding machine room provided by the embodiment of the invention, as the shielding blocks are preset, when the shielding machine room is built, at least one part of the wall body, the top plate, the wall body and the top plate of the shielding machine room can be built only by splicing the shielding blocks without adopting a cast-in-place process in the related technology, so that the period for building the shielding machine room is shortened, and the efficiency for building the machine room is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a shielded machine room according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another shielding machine room according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another shielding machine room according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another shielding machine room according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a shield door of a shield room according to an embodiment of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the related art, a cast-in-place process is adopted for constructing a shielding machine room, and comprises the following steps: and (3) building a template on site, mounting reinforcing steel bars on the template, pouring concrete on the template, and removing the template after the concrete is formed, compacted and hardened. Therefore, the process of building the shielding machine room is complex, the period is long, and the building efficiency is low.
To this end, an embodiment of the present invention provides a shielded room, which can shield radiation, and as shown in fig. 1 to 3, the shielded room includes: the wall body 1 and the roof 2, at least a part of the wall body 1 and/or the roof 2 is formed by splicing a plurality of shielding blocks A.
Here, the wall 1 may be a wall of one wall or a wall of multiple walls, and is located below the top plate 2 and has a certain supporting function on the top plate 2.
In the present embodiment, at least a portion of the wall 1, the ceiling 2, the wall 1 and the ceiling 2 (i.e., the wall and/or the ceiling) of the shielded room is formed by splicing a plurality of shielding blocks a. Because the shielding blocks A are preset, when the shielding machine room is built, at least one part of the wall body 1, the top plate 2, the wall body 1 and the top plate 2 of the shielding machine room can be built only by splicing a plurality of shielding blocks A without adopting a cast-in-place process in the related technology, the period for building the shielding machine room is shortened, and the efficiency for building the machine room is high.
The material of the shielding block a mentioned above may be one or more of concrete (e.g., barite concrete or ordinary concrete), lead, tungsten alloy, and lead alloy. But are not limited to the above materials and may of course be made of other materials that can shield radiation.
In addition, two adjacent shielding blocks a in the plurality of shielding blocks a can be directly connected through a mutually matched connecting structure, such as an inserting structure, specifically, a mortise and tenon structure; the connecting structure can also be connected through an externally-connected additional connecting piece, and the connecting piece can be a metal connecting piece, such as a screw, a rivet, a bolt, a welding rod, a pin and the like, or a connecting piece formed by matching the nail with other connecting structures.
In an embodiment of the present invention, as shown in fig. 2, the wall 1 and/or the ceiling 2 is a single layer, that is, at least a portion of the wall 1 and/or the ceiling 2 formed by splicing a plurality of shielding blocks a may be a single layer.
In order to avoid radiation rays from leaking to the outside of the shielding machine room through the joint surfaces between the adjacent shielding blocks A in the shielding blocks A, the joint positions of the adjacent shielding blocks A in the shielding blocks A are provided with anti-radiation structures B so as to shield rays.
In another embodiment of the present invention, the wall 1 and/or the ceiling 2 may also be multi-layered, that is, the wall 1 and/or the ceiling 2 at least include the first shielding layer 3 and the second shielding layer 4. For example, as shown in fig. 4, the wall 1 and the ceiling 2 of the shielding room are both two layers, or the wall 1 of the shielding room is two layers and the ceiling 2 is three layers.
It should be noted here that each of the first shielding layer 3 and the second shielding layer 4 may include at least one shielding block a.
Compared with the wall body 1 and/or the top plate 2 which are one layer, when the wall body 1 and/or the top plate 2 has the same shielding effect, the wall body 1 and/or the top plate 2 are multiple layers, the thickness of the shielding block A of each layer is reduced compared with that of the shielding block A of one layer, and the carrying of the shielding block A is facilitated.
In order to prevent the radiation rays from leaking out of the shielding machine room through the joint surfaces between the adjacent shielding blocks a in the plurality of shielding blocks a, as shown in fig. 2, a radiation leakage preventing structure B may be provided at the joint position of the adjacent shielding blocks a in the first shielding layer 3 and/or the second shielding layer 4; as shown in fig. 4, the joints of adjacent shielding blocks a in the first shielding layer 3 may also be blocked by the shielding blocks a in the second shielding layer 4, for example: the first shielding layer 3 and the second shielding layer 4 may be arranged in a staggered manner, so that the shielding blocks a in the shielding layer located at the outer side can block the joint surfaces between the adjacent shielding blocks a in the shielding layer located at the inner side, so as to block radiation leakage.
In another embodiment of the invention, as shown in fig. 2, the shielded room further comprises a shielded door 5 for opening or closing the shielded room.
Further, as shown in fig. 2, the shield door 5 includes a first door 51 and a second door 52, and the first door 51 and the second door 52 can be opened and closed along a direction indicated by an arrow in fig. 2.
When the shield door 5 is closed, in order to prevent radiation rays from leaking to the outside of the shield room through the joint surface between the first door body 51 and the second door body 52, a radiation leakage preventing structure B is provided at the joint of the first door body 51 and the second door body 52.
Here, in the above embodiment, the joint between the adjacent shield blocks a and the joint between the first door body 51 and the second door body 52 may be the joint surface (or the contact surface) between the adjacent shield blocks a or between the first door body 51 and the second door body 52, may be an end surface perpendicular to the joint surface, or may be the joint surface and the end surface.
Further, the radiation leakage preventing structure B in the above embodiments may be a joint surface structure of adjacent shielding blocks a, and for example, the joint surface of the radiation leakage preventing structure B may be a curved surface, an inclined surface, a stepped surface, a dovetail surface, a tooth-shaped surface, or the like, which may block radiation. Of course, the anti-radiation structure B in the above embodiment may also be an additional anti-radiation member externally connected, for example, an "i" shaped anti-radiation member is disposed between the joint surfaces of the adjacent shielding blocks a, or an anti-radiation member capable of shielding the joint is disposed on the end surface perpendicular to the joint surfaces.
In order to facilitate the carrying and transportation of the shield door, as shown in fig. 5, the shield door 5 is divided into different parts which can be spliced, and the different parts comprise a door body 6 and a base 7, wherein the base 7 is used for supporting the door body 6. Further, the door body 6 can be divided into different parts which can be spliced, that is, the door body 6 at least comprises a first door body layer 61 and a second door body layer 62, and the base 7 is used for supporting the first door body layer 61 and the second door body layer 62.
Here, at least a part of the first door body layer 61 and/or the second door body layer 62 is formed by joining a plurality of shield blocks a.
In another embodiment of the present invention, the shield room may be directly constructed on a foundation at a predetermined position, and in order to facilitate installation of the shield room and the foundation, a fitting portion for connection with the foundation may be provided on the wall body 1.
The matching part can be matched between the interface and the slot, for example, a steel bar interface is arranged on the foundation, the slot matched with the steel bar interface is arranged at the corresponding position of the wall body 1, and during installation, the slot on the wall body 1 is directly inserted into the steel bar interface.
Further, as shown in fig. 1, the shielding machine room further comprises a bottom plate 9 arranged at the bottom of the wall body 1, so that the whole shielding machine room can be spliced and arranged at any required position as required, a foundation does not need to be additionally built, and the building cost is saved.
Here, the bottom plate 9 and the wall 1 may also be connected by similar matching portions, for example, a steel bar interface is arranged on the bottom plate 9, a slot matched with the steel bar interface is arranged at a corresponding position of the wall 1, and during installation, the slot on the wall 1 is directly inserted into the steel bar interface.
In another embodiment of the present invention, in order to allow air circulation between the inside of the shielded room and the outside, in one embodiment, the shielded room further comprises a ventilation structure 8 for communicating the inside and the outside of the shielded room.
The ventilation mechanism 8 may be disposed on the top plate 2 of the shielded room, or may be disposed in the bottom plate 9 or the wall 1 of the shielded room, which is not limited in the embodiment of the present invention.
The shielding block a of the present invention may be prefabricated as a standard component, and the standard component may include various types, for example, a standard component for the wall 1, a standard component for the top plate 2, a standard component for the shielding door 5, a standard component for the bottom plate 9, a standard component for shielding the top corner or the bottom corner of the machine room, and the like.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (14)
1. The shielding machine room is characterized by comprising a wall body and a top plate, wherein at least one part of the wall body and/or the top plate is formed by splicing a plurality of shielding blocks.
2. The shielding machine room as claimed in claim 1, wherein the wall and/or the top plate is a layer, and a radiation leakage preventing structure is arranged at the joint of the adjacent shielding blocks.
3. The shielded room of claim 1, wherein the walls and/or the ceiling comprise at least a first and a second shield layer.
4. The shielding machine room according to claim 3, wherein the joint of the adjacent shielding blocks in the first shielding layer and/or the second shielding layer is provided with an anti-radiation structure;
or the joints of the adjacent shielding blocks in the first shielding layer are blocked by the shielding blocks in the second shielding layer.
5. The shielded room of claim 1 further comprising a shielded door.
6. The shielding machine room according to claim 5, wherein the shielding door comprises a first door body and a second door body, and an anti-radiation structure is arranged at the joint of the first door body and the second door body.
7. The shielded machinery room of claim 2, 4 or 6, wherein the radiation leakage prevention structure is a curved surface, a slope, a step surface, a dovetail surface or a tooth surface.
8. The shielding machine room according to claim 5, wherein the shielding door comprises a door body and a base, the base is used for supporting the door body, and the door body at least comprises a first door body layer and a second door body layer.
9. The shielded room of claim 8, wherein at least a portion of the first door body layer and/or the second door body layer is formed by splicing a plurality of shielding blocks.
10. The shielded machinery room as claimed in claim 1, wherein the wall is provided with a fitting portion for connection with a foundation.
11. The shielded room of claim 1 further comprising a ventilation structure for communicating the inside and outside of the shielded room.
12. The shielded room of claim 11 further comprising a floor, the ventilation structure being disposed within the floor.
13. The shielding machine room of claim 1, wherein the shielding blocks are made of: concrete, lead, tungsten alloys, lead alloys.
14. The shielding machine room of claim 1, wherein adjacent shielding blocks in the plurality of shielding blocks are connected by a connecting member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910634457.0A CN112211440A (en) | 2019-07-12 | 2019-07-12 | Shielding machine room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910634457.0A CN112211440A (en) | 2019-07-12 | 2019-07-12 | Shielding machine room |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112211440A true CN112211440A (en) | 2021-01-12 |
Family
ID=74047977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910634457.0A Pending CN112211440A (en) | 2019-07-12 | 2019-07-12 | Shielding machine room |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112211440A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115711053A (en) * | 2023-01-09 | 2023-02-24 | 中核第四研究设计工程有限公司 | Fast-assembled concrete shielding chamber |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481107A (en) * | 2016-11-14 | 2017-03-08 | 扬州市美华电气有限公司 | Removable shielding machine room |
| JP2017207370A (en) * | 2016-05-18 | 2017-11-24 | 株式会社竹中工務店 | Radiation shielding body |
| CN207988323U (en) * | 2017-12-06 | 2018-10-19 | 新瑞阳光粒子医疗装备(无锡)有限公司 | A kind of pre-assembled radiation protection shielding of building brick, shroud module component and building system |
| CN211622773U (en) * | 2019-07-12 | 2020-10-02 | 西安大医集团股份有限公司 | Shielding machine room |
-
2019
- 2019-07-12 CN CN201910634457.0A patent/CN112211440A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017207370A (en) * | 2016-05-18 | 2017-11-24 | 株式会社竹中工務店 | Radiation shielding body |
| CN106481107A (en) * | 2016-11-14 | 2017-03-08 | 扬州市美华电气有限公司 | Removable shielding machine room |
| CN207988323U (en) * | 2017-12-06 | 2018-10-19 | 新瑞阳光粒子医疗装备(无锡)有限公司 | A kind of pre-assembled radiation protection shielding of building brick, shroud module component and building system |
| CN211622773U (en) * | 2019-07-12 | 2020-10-02 | 西安大医集团股份有限公司 | Shielding machine room |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115711053A (en) * | 2023-01-09 | 2023-02-24 | 中核第四研究设计工程有限公司 | Fast-assembled concrete shielding chamber |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8042314B2 (en) | Construction for buildings protected against radiation | |
| JP4746645B2 (en) | Formwork elements, formwork parts and methods for creating trench walls in the ground to limit trench wall sections | |
| CN211622773U (en) | Shielding machine room | |
| CN112211440A (en) | Shielding machine room | |
| JP2019056286A (en) | Wall construction method and wall construction structure | |
| JP4590536B2 (en) | Construction method of neutron beam shielding structure | |
| US6443418B1 (en) | Ultra thin-type form panel, a form employing the same, and a method for constructing a foundation | |
| US20210040728A1 (en) | Radiation shielding structure | |
| JP2022105195A (en) | Shield wall | |
| KR20220157159A (en) | Manufacturing method of concrete structure of prefabricated super concrete house | |
| BR102019006432A2 (en) | METALLIC MODULES AND ASSEMBLY SYSTEM FOR FORMING WALLS, FLOOR AND CEILING FOR RADIOTHERAPY ROOM | |
| JP2005127901A (en) | Particle accelerator system of self-shielding type | |
| JP4310212B2 (en) | Filling through holes in buildings | |
| JP6456186B2 (en) | Construction method of radiation shielding room | |
| KR100733791B1 (en) | radiation shielding wall | |
| JP4074088B2 (en) | Nuclear power plant construction method | |
| CN220644731U (en) | Guide wall structure of medical linear accelerator | |
| JP2019207169A (en) | Opening part block structure of radiation shield wall | |
| CN211421451U (en) | Vertical seam connection structure of two perpendicular prefabricated wallboards | |
| JP2022089463A (en) | Radiation shield structure | |
| CN211923921U (en) | Middle vertical door frame structure of radiation-proof vertical hinged door | |
| JP5131832B2 (en) | Concrete structure | |
| KR200394990Y1 (en) | radiation shielding wall | |
| JPH0694863A (en) | Construction method of radiation shielding wall | |
| CN211714888U (en) | Prefabricated bay window structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |