JPH0116395B2 - - Google Patents
Info
- Publication number
- JPH0116395B2 JPH0116395B2 JP56059776A JP5977681A JPH0116395B2 JP H0116395 B2 JPH0116395 B2 JP H0116395B2 JP 56059776 A JP56059776 A JP 56059776A JP 5977681 A JP5977681 A JP 5977681A JP H0116395 B2 JPH0116395 B2 JP H0116395B2
- Authority
- JP
- Japan
- Prior art keywords
- curved cylindrical
- divided
- curvature
- arcuate
- curved
- 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.)
- Expired
Links
- 230000002093 peripheral effect Effects 0.000 claims description 20
- 235000012489 doughnuts Nutrition 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 description 7
- 230000004927 fusion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/10—Nuclear fusion reactors
Landscapes
- Pressure Vessels And Lids Thereof (AREA)
- Thermally Insulated Containers For Foods (AREA)
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は、ドーナツ状の真空容器に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a donut-shaped vacuum container.
(従来の技術)
核融合試験装置では、ドーナツ状の真空容器を
使用して、核融合の試験を行つているが、プラズ
マから中性子、γ線が多量に放出されるので、運
転後のメンテナンス時に、人間が真空容器内へ入
つて作業すことが困難で、真空容器を幾つかの彎
曲筒状部片に分割する一方、遠隔操作により引き
出して、メンテナンスを行う方式が検討されてい
る。(Prior art) Nuclear fusion test equipment uses a doughnut-shaped vacuum vessel to conduct nuclear fusion tests, but since large amounts of neutrons and gamma rays are emitted from the plasma, it is difficult to perform maintenance after operation. Since it is difficult for humans to enter and work inside the vacuum container, a method is being considered in which the vacuum container is divided into several curved cylindrical parts and pulled out by remote control for maintenance.
(発明が解決しようとする問題)
しかし第1図に示すように曲率半径Rの曲率円
Aに沿い彎曲した彎曲筒状部片aの両端部を周方
向に2分して、内周面側に環状凹部a1を、外周面
側に環状凸部a2を、それぞれ設け、同彎曲筒状部
片aの隣り彎曲筒状部片(図示せず)の端面に上
記凹凸部a1,a2に係合する凹凸部を設けて、互い
を係合させるのでは、彎曲筒状部片aを曲率円A
の外側へ遠隔操作により引き出して、メンテナン
スを行うことができないという問題があつた。(Problem to be Solved by the Invention) However, as shown in FIG. An annular recess a 1 is provided on the outer peripheral surface side, and an annular protrusion a 2 is provided on the outer peripheral surface side, and the above-mentioned uneven parts a 1 and a are provided on the end face of a curved cylindrical piece (not shown) adjacent to the curved cylindrical piece a. 2 , the curved cylindrical piece a has a circle of curvature A.
There was a problem in that it was not possible to remotely pull it out to perform maintenance.
本発明は前記の問題点に鑑み提案するものであ
り、その目的とする処は、メンテンナンス時等に
遠隔操作により分解、組立できる真空容器を提供
しようとする点にある。 The present invention has been proposed in view of the above-mentioned problems, and its object is to provide a vacuum container that can be disassembled and assembled by remote control during maintenance or the like.
(課題を解決するための手段)
上記の目的を達成するために、本発明は、曲率
半径Rの曲率円に沿い彎曲した多数の彎曲筒状部
片2a〜2lを有し、同各彎曲筒状部片2a〜2
lの両端部を接合してドーナツ状にするとともに
同各彎曲筒状部片2a〜2lの接合部を環状リツ
プ7,8により密封する真空容器において、相隣
る彎曲筒状部片2a〜2lのうち、一方の彎曲筒
状部片2a,2c,2e,2g,2i,2kの両
端部を曲率円Aを通る鉛直面を境に内側の部分と
外側の部分とに分け、同内側の部分を内外に2分
して、内周面側に第1の弧状凸部3を設け、上記
外側の部分を内外に2分して、外周面側に第2の
弧状凸部4を設け、同一方の彎曲筒状部片2a,
2c,2e,2g,2i,2kの両端部に接合す
る他方の彎曲筒状部片2b,2d,2f,2h,
2j,2lの端面を曲率円Aを通る鉛直面を境に
内側の部分と外側の部分とに分け、同内側の部分
を同方向に2分して、外周面側に前記第1の弧状
凸部3に係合する第3の弧状凸部5を設け、同外
側の部分を周方向に2分して、内周面側に前記第
2の弧状凸部4に係合する第4の弧状凸部6を設
けて、前記一方の彎曲筒状部片2a,2c,2
e,2g,2i,2kを曲率円Aの外側へ引き出
し可能にしている。(Means for Solving the Problems) In order to achieve the above object, the present invention has a large number of curved cylindrical parts 2a to 2l curved along a curvature circle with a curvature radius R, and each of the curved cylindrical parts shaped pieces 2a-2
In a vacuum container in which both ends of the curved cylindrical parts 2a to 2l are joined to form a donut shape, and the joined parts of the curved cylindrical parts 2a to 2l are sealed by annular lips 7 and 8, adjacent curved cylindrical parts 2a to 2l are Among them, both ends of one of the curved cylindrical pieces 2a, 2c, 2e, 2g, 2i, 2k are divided into an inner part and an outer part with a vertical plane passing through the circle of curvature A as the border, and the inner part is divided into an inner part and an outer part. is divided into two parts, inside and outside, and a first arc-shaped convex part 3 is provided on the inner circumference side, and the above-mentioned outer part is divided into two parts, inside and out, and a second arc-shaped convex part 4 is provided on the outer circumference side, and the same one curved cylindrical piece 2a,
The other curved cylindrical pieces 2b, 2d, 2f, 2h, which are joined to both ends of 2c, 2e, 2g, 2i, 2k,
Divide the end faces of 2j and 2l into an inner part and an outer part with a vertical plane passing through the circle of curvature A as the boundary, divide the inner part into two in the same direction, and add the first arcuate convexity to the outer peripheral surface side. A third arcuate convex portion 5 that engages with the second arcuate convex portion 4 is provided on the inner peripheral surface side, and a fourth arcuate convex portion 5 that engages with the second arcuate convex portion 4 is provided on the inner circumferential surface side. A convex portion 6 is provided, and the one curved cylindrical portion 2a, 2c, 2
e, 2g, 2i, and 2k can be pulled out to the outside of the circle of curvature A.
(作用)
本発明は前記のように曲率半径Rの曲率円に沿
い湾曲した多数の彎曲筒状部片2a〜2lを有
し、同各彎曲筒状部片2a〜2lの両端部を接合
してドーナツ状にするとともに同各彎曲筒状部片
2a〜2lの接合部を環状リツプ7,8により密
封する真空容器において、相隣る彎曲筒状部片2
a〜2lのうち、一方の彎曲筒状部片2a,2
c,2e,2g,2i,2kの両端部を曲率円A
を通る鉛直面を境に内側の部分と外側の部分とに
分け、同内側の部分を内外に2分して、内周面側
に第1の弧状凸部3を設け、上記外側の部分を内
外に2分して、外周面側に第2の弧状凸部4を設
け、同一方の彎曲筒状部片2a,2c,2e,2
g,2i,2kの両端部に接合する他方の彎曲筒
状部片2b,2d,2f,2h,2j,2lの端
面を曲率円Aを通る鉛直面を境に内側の部分と外
側の部分とに分け、同内側の部分を周方向に2分
して、外周面側に前記第1の弧状凸部3に係合す
る第3の弧状凸部5を設け、同外側の部分を同方
向に2分して、内周面側に前記第2の弧状凸部4
に係合する第4の弧状凸部6を設けたので、メン
テナンス時等に各彎曲筒状部片2a〜2lの接合
部を密封する環状リツプ7,8の溶接部を切断す
ると、一方の彎曲筒状部片2a,2c,2e,2
g,2i,2kを遠隔操作により曲率円Aの外側
へ引き出すことができる。(Function) As described above, the present invention has a large number of curved cylindrical pieces 2a to 2l that are curved along a circle of curvature with a radius of curvature R, and both ends of each of the curved cylindrical pieces 2a to 2l are joined. In a vacuum container in which the curved cylindrical pieces 2a to 2l are shaped into a donut shape and the joints of the curved cylindrical pieces 2a to 2l are sealed by annular lips 7 and 8, the adjacent curved cylindrical pieces 2 are
Among a to 2l, one curved cylindrical piece 2a, 2
Both ends of c, 2e, 2g, 2i, 2k are circles of curvature A
The inner part is divided into an inner part and an outer part with a vertical plane passing through it as a boundary, and the inner part is divided into two parts, inside and outside, and a first arc-shaped convex part 3 is provided on the inner peripheral surface side, The curved cylindrical pieces 2a, 2c, 2e, 2 are divided into two parts, inside and outside, and a second arcuate convex part 4 is provided on the outer peripheral surface side.
The end faces of the other curved cylindrical pieces 2b, 2d, 2f, 2h, 2j, and 2l that are joined to both ends of the curved cylindrical parts 2b, 2i, and 2k are divided into an inner part and an outer part with the vertical plane passing through the circle of curvature A as the boundary. The inner part is divided into two in the circumferential direction, and a third arcuate protrusion 5 that engages with the first arcuate protrusion 3 is provided on the outer peripheral surface side, and the outer part is divided into two in the circumferential direction. It is divided into two parts, and the second arcuate convex part 4 is formed on the inner peripheral surface side.
Since the fourth arcuate convex portion 6 is provided, when the welded portions of the annular lips 7 and 8 that seal the joints of the respective curved cylindrical portions 2a to 2l are cut during maintenance etc., one of the curved cylindrical portions 2a to 2l is Cylindrical pieces 2a, 2c, 2e, 2
g, 2i, and 2k can be pulled out to the outside of the circle of curvature A by remote control.
(実施例)
次に本発明の真空容器を第2図乃至第7図に示
す一実施例により説明すると、第2図の1が真空
容器で、同真空容器1は、曲率半径Rの曲率円A
に沿い彎曲し且つ自身の半径がrの彎曲筒状部片
2a〜2lを有し、1つ置きの彎曲筒状部片2
a,2c,2e,2g,2i,2kが第3図乃至
第7図のように構成されている。即ち、彎曲筒状
部片2aに例をとつて説明すると、彎曲筒状部片
2aの両端面が曲率円Aを通る鉛直面を境に内側
の部分と外側の部分とに分けられ、さらに同内側
の部分が周方向に沿い2分されて、内周面側に第
1の弧状凸部3が設けられ、上記外側の部分が周
方向に沿い2分されて、外周面側に第2の弧状凸
部4が設けられている。また残る1つ置きの彎曲
筒状部片2b,2d,2f,2h,2j,2lが
次のように構成されている。即ち、上記彎曲筒状
部片2aに隣り合う彎曲筒状部片2a,2lに例
をとつて説明すると、同彎曲筒状部片2a,2l
の両端面が曲率円Aを通る鉛直面を境に内側の部
分と外側の部分とに分けられ、同内側の部分が周
方向に2分されて、外周面側に前記第1の弧状凸
部3に係合する第3の弧状凸部5が設けられ、同
外側の部分が周方向に2分されて、内周面側に前
記第2の弧状凸部4に係合する第4の弧状凸部6
が設けられている。従つて彎曲筒状部片2aは、
第2図の矢印B,C方向に引き出したり、挿入し
たりすることが可能になるが、引き出す際、第1
の弧状凸部3の端部3a(第3図参照)が第4の
弧状凸部6の端部6aに衝接するのを防止するた
め、Dの範囲には、第1の弧状凸部3及び第4の
弧状凸部6を設けない。また第3図の符号7,8
が前記各彎曲筒状部片2a〜2lの端面近くの外
周面に設けた環状リツプで、互いを溶接すること
により真空容器1内を気密的に密封するようにな
つている。なお彎曲筒状部片の数は、図示の例に
限定されない。(Embodiment) Next, the vacuum container of the present invention will be explained with reference to an embodiment shown in FIGS. 2 to 7. In FIG. A
It has curved cylindrical parts 2a to 2l which are curved along the curve and whose radius is r, and every other curved cylindrical part 2
a, 2c, 2e, 2g, 2i, and 2k are constructed as shown in FIGS. 3 to 7. That is, taking the curved cylindrical piece 2a as an example, both end surfaces of the curved cylindrical piece 2a are divided into an inner part and an outer part with a vertical plane passing through the circle of curvature A as the border, and the same part is divided into an inner part and an outer part. The inner part is divided into two parts along the circumferential direction, and a first arcuate convex part 3 is provided on the inner peripheral surface side, and the above-mentioned outer part is divided into two parts along the circumferential direction, and a second arcuate convex part 3 is provided on the outer peripheral surface side. An arcuate convex portion 4 is provided. The remaining curved cylindrical pieces 2b, 2d, 2f, 2h, 2j, and 2l are configured as follows. That is, taking as an example the curved cylindrical parts 2a and 2l adjacent to the curved cylindrical part 2a, the curved cylindrical parts 2a and 2l
is divided into an inner part and an outer part by a vertical plane passing through the circle of curvature A, and the inner part is divided into two in the circumferential direction, and the first arcuate convex part is formed on the outer peripheral surface side. A third arcuate protrusion 5 that engages with the second arcuate protrusion 4 is provided, the outer side of which is divided into two in the circumferential direction, and a fourth arcuate protrusion 5 that engages with the second arcuate protrusion 4 is provided on the inner peripheral surface side. Convex portion 6
is provided. Therefore, the curved cylindrical piece 2a is
It can be pulled out or inserted in the directions of arrows B and C in Figure 2, but when pulling out,
In order to prevent the end 3a of the arcuate protrusion 3 (see FIG. 3) from colliding with the end 6a of the fourth arcuate protrusion 6, the first arcuate protrusion 3 and The fourth arcuate convex portion 6 is not provided. Also, reference numerals 7 and 8 in Figure 3
is an annular lip provided on the outer peripheral surface near the end face of each of the curved cylindrical pieces 2a to 2l, and is designed to hermetically seal the inside of the vacuum vessel 1 by welding them together. Note that the number of curved cylindrical pieces is not limited to the illustrated example.
(発明の効果)
本発明は前記のように曲率半径Rの曲率円に沿
い湾曲した多数の彎曲筒状部片2a〜2lを有
し、同各彎曲筒状部片2a〜2lの両端部を接合
してドーナツ状にするとともに同各彎曲筒状部片
2a〜2lの接合部を環状リツプ7,8により密
封する真空容器において、相隣る彎曲筒状部片2
a〜2lのうち、一方の彎曲筒状部片2a,2
c,2e,2g,2i,2kの両端部を曲率円A
を通る鉛直面を境に内側の部分と外側の部分とに
分け、同内側の部分を内外に2分して、内周面側
に第1の弧状凸部3を設け、上記外側の部分を内
外に2分して、外周面側に第2の弧状凸部4を設
け、同一方の彎曲筒状部片2a,2c,2e,2
g,2i,2kの両端部に接合する他方の彎曲筒
状部片2b,2d,2f,2h,2j,2lの端
面を曲率円Aを通る鉛直面を境に内側の部分と外
側の部分とに分け、同内側の部分を周方向に2分
して、外周面側に前記第1の弧状凸部3に係合す
る第3の弧状凸部5を設け、同外側の部分を周方
向に2分して、内周面側に前記第2の弧状凸部4
に係合する第4の弧状凸部6を設けたので、メン
テナンス時等に各彎曲筒状部片2a〜2lの接合
部を密封する環状リツプ7,8の溶接部を切断す
ると、一方の彎曲筒状部片2a,2c,2e,2
g,2i,2kを遠隔操作により曲率円Aの外側
に引き出すことができて、メンテンナンス時等に
真空容器1を遠隔操作により分解、組立できる効
果がある。(Effects of the Invention) As described above, the present invention has a large number of curved cylindrical pieces 2a to 2l that are curved along a circle of curvature with a radius of curvature R, and both ends of each of the curved cylindrical pieces 2a to 2l are In a vacuum container in which the curved cylindrical pieces 2a to 2l are joined to form a donut shape and the joints of the curved cylindrical pieces 2a to 2l are sealed by annular lips 7 and 8, adjacent curved cylindrical pieces 2
Among a to 2l, one curved cylindrical piece 2a, 2
Both ends of c, 2e, 2g, 2i, 2k are circles of curvature A
The inner part is divided into an inner part and an outer part with a vertical plane passing through it as a boundary, and the inner part is divided into two parts, inside and outside, and a first arc-shaped convex part 3 is provided on the inner peripheral surface side, The curved cylindrical pieces 2a, 2c, 2e, 2 are divided into two parts, inside and outside, and a second arcuate convex part 4 is provided on the outer peripheral surface side.
The end faces of the other curved cylindrical pieces 2b, 2d, 2f, 2h, 2j, and 2l that are joined to both ends of the curved cylindrical parts 2b, 2i, and 2k are divided into an inner part and an outer part with the vertical plane passing through the circle of curvature A as the boundary. The inner part is divided into two in the circumferential direction, and a third arcuate protrusion 5 that engages with the first arcuate protrusion 3 is provided on the outer peripheral surface side, and the outer part is divided into two in the circumferential direction. It is divided into two parts, and the second arcuate convex part 4 is formed on the inner peripheral surface side.
Since the fourth arcuate convex portion 6 is provided, when the welded portions of the annular lips 7 and 8 that seal the joints of the respective curved cylindrical portions 2a to 2l are cut during maintenance etc., one of the curved cylindrical portions 2a to 2l is Cylindrical pieces 2a, 2c, 2e, 2
g, 2i, and 2k can be pulled out to the outside of the circle of curvature A by remote control, and the vacuum container 1 can be disassembled and assembled by remote control during maintenance or the like.
第1図は従来の真空容器の彎曲筒状部片を示す
縦断平面図、第2図は本発明に係わる真空容器の
一実施例を示す一部横断平面図、第3図はその一
部横断平面図、第4図は第3図の矢視−線に
沿う側面図、第5図は第4図の矢視−線に沿
う横断平面図、第6図は第5図の矢視−線に
沿う縦断側面図、第7図は第5図の矢視−線
に沿う縦断側面図である。
1……真空容器、2a,2c,2e,2g,2
i,2k……一方の彎曲筒状部片、2b,2d,
2f,2h,2j,2l……他方の彎曲筒状部
片、3……第1の弧状凸部、4……第2の弧状凸
部、5……第3の弧状凸部、6……第4の弧状凸
部、7,8……環状リツプ。
FIG. 1 is a longitudinal sectional plan view showing a curved cylindrical piece of a conventional vacuum container, FIG. 2 is a partially sectional plan view showing an embodiment of the vacuum container according to the present invention, and FIG. 3 is a partially sectional plan view thereof. A plan view, FIG. 4 is a side view along the line shown in FIG. 3, FIG. 5 is a cross-sectional plan view taken along the line shown in FIG. 4, and FIG. 6 is a side view taken along the line shown in FIG. FIG. 7 is a vertical side view taken along the arrow line in FIG. 5. FIG. 1...Vacuum container, 2a, 2c, 2e, 2g, 2
i, 2k...one curved cylindrical piece, 2b, 2d,
2f, 2h, 2j, 2l... the other curved cylindrical part, 3... the first arcuate protrusion, 4... the second arcuate protrusion, 5... the third arcuate protrusion, 6... Fourth arcuate convex portion, 7, 8... annular lip.
Claims (1)
曲筒状部片2a〜2lを有し、同各彎曲筒状部片
2a〜2lの両端部を接合してドーナツ状にする
とともに同各彎曲筒状部片2a〜2lの接合部を
環状リツプ7,8により密封する真空容器におい
て、相隣る彎曲筒状部片2a〜2lのうち、一方
の彎曲筒状部片2a,2c,2e,2g,2i,
2kの両端部を曲率円Aを通る鉛直面を境に内側
の部分と外側の部分とに分け、同内側の部分を内
外に2分して、内周面側に第1の弧状凸部3を設
け、上記外側の部分を内外に2分して、外周面側
に第2の弧状凸部4を設け、同一方の彎曲筒状部
片2a,2c,2e,2g,2i,2kの両端部
に接合する他方の彎曲筒状部片2b,2d,2
f,2h,2j,2lの端面を曲率円Aを通る鉛
直面を境に内側の部分と外側の部分とに分け、同
内側の部分を同方向に2分して、外周面側に前記
第1の弧状凸部3に係合する第3の弧状凸部5を
設け、同外側の部分を周方向に2分して、内周面
側に前記第2の弧状凸部4に係合する第4の弧状
凸部6を設けて、前記一方の彎曲筒状部片2a,
2c,2e,2g,2i,2kを曲率円Aの外側
へ引き出し可能にしたことを特徴とする真空容
器。1 It has a large number of curved cylindrical pieces 2a to 2l that are curved along a circle of curvature with a radius of curvature R, and both ends of each of the curved cylindrical pieces 2a to 2l are joined to form a donut shape, and each of the curved cylindrical pieces 2a to 2l is shaped like a doughnut. In a vacuum container in which the joints of the cylindrical pieces 2a to 2l are sealed by annular lips 7 and 8, one of the adjacent curved cylindrical pieces 2a to 2l, 2a, 2c, 2e, 2g, 2i,
2k is divided into an inner part and an outer part with a vertical plane passing through the circle of curvature A as the border, and the inner part is divided into two parts, inside and outside, and a first arc-shaped convex part 3 is formed on the inner peripheral surface side. The above-mentioned outer part is divided into inner and outer parts, a second arcuate convex part 4 is provided on the outer peripheral surface side, and both ends of the same curved cylindrical part 2a, 2c, 2e, 2g, 2i, 2k are provided. The other curved cylindrical piece 2b, 2d, 2 joined to the
The end faces of f, 2h, 2j, and 2l are divided into an inner part and an outer part by a vertical plane passing through the circle of curvature A, and the inner part is divided into two in the same direction, and the above-mentioned A third arcuate protrusion 5 is provided which engages with the first arcuate protrusion 3, and the outer portion thereof is divided into two in the circumferential direction, and the third arcuate protrusion 5 engages with the second arcuate protrusion 4 on the inner peripheral surface side. A fourth arcuate convex portion 6 is provided, and the one curved cylindrical portion 2a,
A vacuum container characterized in that 2c, 2e, 2g, 2i, and 2k can be drawn out to the outside of a circle of curvature A.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56059776A JPS57175284A (en) | 1981-04-22 | 1981-04-22 | Vacuum vessel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56059776A JPS57175284A (en) | 1981-04-22 | 1981-04-22 | Vacuum vessel |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57175284A JPS57175284A (en) | 1982-10-28 |
JPH0116395B2 true JPH0116395B2 (en) | 1989-03-24 |
Family
ID=13123024
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56059776A Granted JPS57175284A (en) | 1981-04-22 | 1981-04-22 | Vacuum vessel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57175284A (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5425167Y2 (en) * | 1974-08-15 | 1979-08-23 | ||
JPS5851170B2 (en) * | 1975-10-11 | 1983-11-15 | ナショナル住宅産業株式会社 | house heating system |
-
1981
- 1981-04-22 JP JP56059776A patent/JPS57175284A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS57175284A (en) | 1982-10-28 |
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