JPH04500630A - Continuous casting equipment for thin slabs in a magnetic field - Google Patents
Continuous casting equipment for thin slabs in a magnetic fieldInfo
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- JPH04500630A JPH04500630A JP50913389A JP50913389A JPH04500630A JP H04500630 A JPH04500630 A JP H04500630A JP 50913389 A JP50913389 A JP 50913389A JP 50913389 A JP50913389 A JP 50913389A JP H04500630 A JPH04500630 A JP H04500630A
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- magnetic field
- circulation chamber
- slab
- coolant circulation
- field structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/01—Continuous casting of metals, i.e. casting in indefinite lengths without moulds, e.g. on molten surfaces
- B22D11/015—Continuous casting of metals, i.e. casting in indefinite lengths without moulds, e.g. on molten surfaces using magnetic field for conformation, i.e. the metal is not in contact with a mould
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Continuous Casting (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるため要約のデータは記録されません。 (57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 磁場内における薄肉鋳片の連続鋳造装置産業分野 本発明は非鉄金属、鉄金属及びそれらの合金の連続鋳造装置に関し、殊に磁場内 における薄形鋳片の連続鋳造装置に関する。[Detailed description of the invention] Continuous casting equipment for thin-walled slabs in a magnetic field Industrial field The present invention relates to a continuous casting apparatus for nonferrous metals, ferrous metals, and their alloys, and particularly in a magnetic field. This invention relates to a continuous casting device for thin slabs.
従来の技術 磁場内における金属の連続鋳造装！ （ＳＵ、 Ａ、第２３３．１８６号）は該 業界において公知である。上記連続鋳造装置はストランド形成ヘッド内に液状金 属を供給する樋と、ストランドに対して共軸状位置に配置された水冷式磁場内構 進物と、じょうごの出口の寸法がストランドの寸法に等しくなるように下方に向 けて次第に細くなったじょうご形の２次冷却帯とからなっている。供給室内の冷 却媒体がじょうごの外壁上に亘って流される。じょうごの下端が磁場用構造物の 内壁で構成された空間内に延びているので、磁場用構造物によって生じた磁力が 最大になる場所に冷却媒体がはねかかることがない。しかし磁場用構造物の内壁 で構成された空間内にじょうごが存在するので磁場にひずみを生じ、従って鋳片 の厚さが特定値から外れる。ストランドの厚さが１００嘘以上の場合には厚さの 誤差は無視できる。しかし厚さが４０ｏｎ以下の鋳片を鋳造する場合には製品に 削り傷を生ずる、。Conventional technology Continuous metal casting equipment in a magnetic field! (SU, A, No. 233.186) is applicable. Known in the industry. The above continuous casting equipment has liquid gold in the strand forming head. a water-cooled magnetic field system located coaxially with respect to the strands; Place the gift in a downward direction so that the dimension of the funnel exit is equal to the dimension of the strand. It consists of a funnel-shaped secondary cooling zone that gradually becomes narrower. Cooling in the supply room A cooling medium is flowed over the outer wall of the funnel. The lower end of the funnel is connected to the magnetic field structure. Because it extends into the space formed by the inner wall, the magnetic force generated by the magnetic field structure is The cooling medium will not be splashed where it is at its maximum. However, the inner wall of the structure for magnetic field The existence of a funnel in a space made up of thickness deviates from a specific value. If the thickness of the strand is 100 degrees or more, the thickness The error is negligible. However, when casting slabs with a thickness of 40 ounces or less, the product Causes scratches.
特表千４−５００６３０ （２） 薄肉鋳片の連続鋳造装置（ＵＳ、Ａ、第４．３７５．２３４号）も公知である。Special Table Sen4-500630 (2) An apparatus for continuous casting of thin-walled slabs (US, A, No. 4.375.234) is also known.
この連続鋳造装置は底部の出口開口の断面積が鋳片の断面積に等しいタンディツ シュと、上記出口開口と共軸状位置に鋳片に対してタンディツシュのレベルに配 置された水冷式磁場用構造物と、磁場用構造物で構成された磁場の外側に設けら れ、鋳片の前進方向に見た場合に出口開口の後に配置された２次冷却帯とからな りたっている。鋳造速度が遅い（２００ｍｍ／ａ＋ｉｎ以下）の場合には、この ２次冷却帯の構造によって、断面形の如何に拘らず同一厚さの品質のすぐれた薄 肉鋳片の鋳造が得られる。しかしこの構造の２次冷却帯の構造の鋳造速度の限界 は２００ｗ ／ １Ｘｌｉ ｎである。これより高い鋳造速度において、一定の 熱伝導を有する金属材料の固液界面は、磁場用構造物で作られた磁場の外側に滞 在するので製品の品質が低下する。This continuous casting equipment is a tundit whose cross-sectional area of the outlet opening at the bottom is equal to the cross-sectional area of the slab. The tundish is placed at the level of the tundish against the slab in a coaxial position with the outlet opening. A water-cooled magnetic field structure and a magnetic field structure are installed outside the magnetic field. When viewed in the direction of advancement of the slab, it is separated from the secondary cooling zone located after the outlet opening. It is standing. If the casting speed is slow (200mm/a+in or less), this Due to the structure of the secondary cooling zone, the same thickness can be achieved regardless of the cross-sectional shape. A molded slab is obtained. However, there is a limit to the casting speed of this secondary cooling zone structure. is 200w/1Xlin. At higher casting speeds, a constant The solid-liquid interface of a metallic material that conducts heat remains outside the magnetic field created by the magnetic field structure. The quality of the product deteriorates due to the presence of
発明の要約 本発明の主たる目的は、鋳造速度が２００ｍ／ａ＋ｉｎを越えた磁場用構造物で 構成された磁場内に鋳片の固液界面を維持するように形成された２次冷却帯を備 えた、磁場内における薄肉鋳片の連続鋳造装置を提供することである。Summary of the invention The main object of the present invention is to provide a magnetic field structure with a casting speed exceeding 200 m/a+in. Equipped with a secondary cooling zone formed to maintain the solid-liquid interface of the slab within the configured magnetic field. The object of the present invention is to provide an apparatus for continuously casting thin slabs in a magnetic field.
上記の目的は、溶湯を収容しかつ鋳片の断面積を同一の断面積を有する出口開口 を底部に設けたタンディツシュと、出口開口と共軸状位置に配置した水冷式磁場 用構造物と、該磁場用構造物内に設けた２次冷却帯とを備えた磁場内における薄 肉鋳片の連続鋳造装置において、本発明によれば、磁場用構造物は、タンディツ シュの直下に配置されかつ２次冷却帯と結合され、該２次冷却帯は、磁場用構造 物の外壁の周縁に沿って配設された少なくとも一つの冷却液循環室と、磁場用構 造物の本体を貫通しかつ一端で冷却液循環室に連通し、他端で、磁場用構造物の 内壁で囲まれた空間に連通ずる半径方向の流路の少なくとも一つの列とを備えた 磁場内における薄肉鋳片の連続鋳造装置によって達成される。The above purpose is to accommodate the molten metal and to create an outlet opening with the same cross-sectional area as the slab cross-sectional area. tundish installed at the bottom and a water-cooled magnetic field located coaxially with the exit opening. A thin film in a magnetic field comprising a magnetic field structure and a secondary cooling zone provided within the magnetic field structure. According to the present invention, in the continuous casting apparatus for slabs, the magnetic field structure is and is coupled to a secondary cooling zone, the secondary cooling zone comprising a magnetic field structure. at least one coolant circulation chamber arranged along the periphery of the outer wall of the object and a structure for a magnetic field; It penetrates the body of the structure and communicates with the coolant circulation chamber at one end, and the magnetic field structure at the other end. at least one row of radial channels communicating with the space enclosed by the inner wall. This is achieved by a continuous casting machine for thin-walled slabs in a magnetic field.
鋳片を均斉に冷却するために、冷却液循環室の断面積を冷却液の流れに従って減 少させると好都合である。In order to uniformly cool the slab, the cross-sectional area of the cooling fluid circulation chamber is reduced according to the flow of the cooling fluid. It is convenient to reduce the amount.
薄肉鋳片の鋳造速度を増すために、２次冷却帯が、鋳片の前進方向に見た場合に 継続的に配設された自己保持型の二つの冷却液循環室と、半径方向の流路の二つ の列を備え、各列は適宜の冷却液循環室と連通し、一方の冷却液循環室に連通し た列の流路が、他の冷却液循環室に連通した列の流路に対して連通ずる他の列の 流路に対して縁部に沿ってずらされていると好都合である。In order to increase the casting speed of thin-walled slabs, the secondary cooling zone is Two continuous, self-retaining coolant circulation chambers and two radial channels. Each row communicates with an appropriate coolant circulation chamber, and communicates with one coolant circulation chamber. The flow passages in the rows that communicated with the flow passages in the rows that communicated with other coolant circulation chambers Advantageously, it is offset along the edges with respect to the flow path.
鋳片をさらに均斉に冷却するために、列の流路が他の列の流路間の距離の１／４ 〜３７４倍の距離だけずらされていると好都合である。In order to cool the slab more evenly, the flow passages in one row are 1/4 the distance between the flow passages in other rows. Conveniently, they are offset by a distance of ~374 times.
冷却液のはねかかりを防止してさらに効果的に冷却するために、鋳片の前進方向 に対して半径方向の流路を９０°よりも小さい角度αをなすように傾斜されるこ とが好ましい。In order to prevent cooling liquid from splashing and achieve more effective cooling, the forward direction of the slab is The radial flow path may be inclined at an angle α smaller than 90°. is preferable.
本発明にかかる、磁場内における薄肉鋳片の連続鋳造装置において、２次冷却帯 は鋳片の前進方向に関して磁場用構造物のレベルに配置され、磁場用構造物の本 体を貫通した半径方向の流路を介して、冷却液が冷却液＠温室から磁場用構造物 の内壁で囲まれた空間に供給されるので、鋳造速度が速い場合（２００ｏｎ／ｗ ｉｎ以上）でも固液界面は、磁力が最大とな、った磁場用構造物の内壁で囲まれ た空間内に滞在する。これらの構造上の特長によって装置の性能が向上し、か° つ製品の品質が改善される。In the continuous casting apparatus for thin-walled slabs in a magnetic field according to the present invention, the secondary cooling zone is placed at the level of the magnetic field structure with respect to the advancing direction of the slab, and The coolant is transferred from the coolant@greenhouse to the magnetic field structure via radial channels through the body. When the casting speed is high (200 on/w), Even when the magnetic force is at its maximum, the solid-liquid interface is surrounded by the inner wall of the magnetic field structure. stay in a space that These structural features improve device performance and Product quality is improved.
（以下余白） 図面の簡単な説明 以下、添付図面を参照して、本発明の範囲を限定することのない実施例について 説明する。(Margin below) Brief description of the drawing Examples, which do not limit the scope of the present invention, will be described below with reference to the accompanying drawings. explain.
第１図は磁場内における薄肉鋳片を連続鋳造するための本発明にかかる装置の断 面図である。FIG. 1 shows a cross section of an apparatus according to the invention for continuous casting of thin slabs in a magnetic field. It is a front view.
第２図は第１図の■−■線に沿った断面図である。FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1.
第３図は第２列の半径方向の流路の軸線に沿って切断した第３図の部分Ａを示す 拡大図である。Figure 3 shows section A of Figure 3 taken along the axis of the second row of radial channels. This is an enlarged view.
第４図は第３図の矢印已に沿って示した図である。FIG. 4 is a view taken along the arrow in FIG.
実施例 第１図について説明すると、本発明の装置は、例えばアルミニュウム或いはアル ミニュウム基合金等の金属材料の溶湯２を入れたタンディツシュ１と、タンディ ツシュ１の底部に形成されて鋳片４の断面積に等しい断面積を有する出口開口３ とを備える。トロイド形の水冷式磁場用構造体５は、該磁場用構造体５の室６内 で冷却水が循環するように入口管７（第２図）と出口管（不図示）とを有する室 ６を備える。磁場用構造物５は、鋳片の前進方向に見た場合にタンディツシユ１ の後方において出口開口３に共軸状位置に配置されている。磁場用構造物に電力 を供給する導線は図に示さない。Example Referring to FIG. 1, the device of the present invention can be A tandish 1 containing a molten metal 2 of a metal material such as a minium-based alloy, and a tandish An outlet opening 3 formed at the bottom of the tush 1 and having a cross-sectional area equal to the cross-sectional area of the slab 4 Equipped with. The toroid-shaped water-cooled magnetic field structure 5 is located inside the chamber 6 of the magnetic field structure 5. A chamber having an inlet pipe 7 (FIG. 2) and an outlet pipe (not shown) for circulating cooling water. 6. The magnetic field structure 5 is similar to the tundish 1 when viewed in the advancing direction of the slab. It is arranged in a coaxial position with the outlet opening 3 at the rear of the . Power to structures for magnetic fields The conductors supplying this are not shown in the figure.
また連続鋳造装置は磁場用構造物５に結合され、かつ少なくとも一つの自己保持 型に却液循環室を有する２次冷却帯８を備える。この実施例においては入口管１ １．１２ （第２図）を夫々備える二つの自己保持型冷却液循導室９，１０が設 ＋ｊられ、該入口管１１．１２を通して夫々の冷却液が夫々の冷却液循環室９． １０（第１．３図）に別々に送り込まれる。冷却液循環室９．１０は薄肉鋳片の 前進方向に見た場合に、磁場用構造物５の外壁の外周縁に継続的に配置される。The continuous casting device is also coupled to the magnetic field structure 5 and has at least one self-retaining structure. The mold is equipped with a secondary cooling zone 8 having a coolant circulation chamber. In this embodiment, the inlet pipe 1 1.12 (Fig. 2) Two self-retaining coolant circulation chambers 9, 10 are installed. +j and through the inlet pipes 11.12 the respective cooling liquids are supplied to the respective cooling liquid circulation chambers 9. 10 (Fig. 1.3) separately. The coolant circulation chamber 9.10 is made of thin-walled slabs. When viewed in the forward direction, it is continuously arranged at the outer periphery of the outer wall of the magnetic field structure 5 .
冷却液循環室９，１００断面積は冷却液の流れに従って減少している。The cross-sectional area of the coolant circulation chamber 9,100 decreases as the coolant flows.
また２次冷却帯は少なくとも一列の半径方向流路を有する。The secondary cooling zone also has at least one row of radial passages.
この実施例においては、一端で適宜の冷却液循環室９．１０（第１，３図）に連 通し、他端で、磁場用構造物５の内壁により囲まれた空間１６に連通ずる２列１ ３．１４の半径方向の流路１５が設けられている。冷却液循環室９（第３図）に 連通した列１３の流路１５（第４図）は、冷却液循環室１０（第３図）に連通し た列１４の流路１５（第４図）に対して冷却液循環室９の縁部に沿い距離ｌだけ ずらして配列されている。距離ｌは列１３の隣接した流路１５間の距離Ｓの１／ ４乃至３／４で、この実施例ではＡ＝Ｓ／２である。In this embodiment, one end is connected to a suitable coolant circulation chamber 9.10 (FIGS. 1 and 3). two rows 1 through which the other end communicates with the space 16 surrounded by the inner wall of the magnetic field structure 5; 3.14 radial channels 15 are provided. In the coolant circulation chamber 9 (Fig. 3) The flow passages 15 (FIG. 4) of the connected rows 13 communicate with the coolant circulation chamber 10 (FIG. 3). A distance l along the edge of the coolant circulation chamber 9 with respect to the flow path 15 of the row 14 (FIG. 4) They are arranged in a staggered manner. The distance l is 1/ of the distance S between adjacent channels 15 in the row 13. 4 to 3/4, and in this example A=S/2.
もし７半径方向の流路１５が１／４Ｓよりも小さいか或いは３／４Ｓよりも大き い距Ｍｌに亘ってずらされていると、薄肉の鋳片４はその幅に亘って不均斉に冷 却され、表面の仕上りが悪くなりかつ鋳片４の組織が不均斉になる。7 If the radial channel 15 is smaller than 1/4S or larger than 3/4S When the slab 4 is shifted over a long distance Ml, the thin slab 4 cools unevenly over its width. As a result, the surface finish becomes poor and the structure of the slab 4 becomes asymmetric.
半径方向の流路１５は鋳片４の前進方向に対して、夫々９０゜よりも小さい角度 αをなして傾斜している。半径方向の流路１５に傾斜を付けたのは、鋳片４の固 液界面］７より上方の領域内に冷却液がはねかかるのを防止するためである。固 液界面より上方領域内の磁場用構造物５の磁場は磁場用構造物５の内壁で囲まれ た空間内の磁場よりも弱く、前者内の鋳片４は未だ液相状態であってその幅は所 定の鋳片の幅よりも広い。The radial channels 15 are each formed at an angle of less than 90° with respect to the advancing direction of the slab 4. It is inclined at an angle of α. The reason why the radial flow path 15 is inclined is because of the rigidity of the slab 4. This is to prevent the cooling liquid from splashing into the area above [liquid interface] 7. solid The magnetic field of the magnetic field structure 5 in the region above the liquid surface is surrounded by the inner wall of the magnetic field structure 5. The magnetic field in the former space is weaker than the magnetic field in the former space, and the slab 4 in the former is still in a liquid phase and its width is small in some places. Wider than the standard slab width.
第１〜４図に示す連続鋳造装置は下記のように作動する。The continuous casting apparatus shown in FIGS. 1-4 operates as follows.
ダミーパー１８を引張る引張り手段（不図示）によってダミーパー１８をタンデ ィツシュ１底部の出口開口３の位置にもたらす。磁場用構造物５に通電し、入口 管７を介して室６に冷却水を送入して磁場用構造物５を冷却する。The dummy par 18 is held in tandem by a tensioning means (not shown) that pulls the dummy par 18. Place the dish 1 at the outlet opening 3 at the bottom. The magnetic field structure 5 is energized and the entrance Cooling water is fed into the chamber 6 via the pipe 7 to cool the magnetic field structure 5.
磁場用構造物５の室を循環中に、冷却水は出口管（不図示）を介して上記室６か ら排出される。また冷却液は入口管１１゜１２を介して夫々の冷却液循環室９， １０に送入され、次いで磁場用構造物５の本体を通過する半径方向の流路１５を 通って、磁場用構造物５の内壁で囲まれた空間１６に到達する。従って循環室９ 内の冷却液は列１３の半径方向流路１５に亘って流れ、また循環室１０内の冷却 液は列１４の半径方向流路１５に亘って流れる。While circulating in the chamber of the magnetic field structure 5, the cooling water flows into the chamber 6 through an outlet pipe (not shown). is discharged. Further, the cooling liquid is supplied to the respective cooling liquid circulation chambers 9, 12 through inlet pipes 11 and 12, respectively. 10 and then through the body of the magnetic field structure 5. It passes through and reaches a space 16 surrounded by the inner wall of the magnetic field structure 5. Therefore, the circulation chamber 9 The cooling liquid in the circulation chamber 10 flows over the radial channels 15 of the row 13 and the cooling liquid in the circulation chamber 10 The liquid flows across the radial channels 15 of the rows 14.
アルミニウム或いはアルミニウム基合金等の溶解した金属がタンディツシュ１に 注湯される。溶解が連続鋳造処理に適当した状態になっていると、この状態は鋳 造工程中維持される。ダミーパー１８を引張る引張り手段は特定の鋳造速度（２ ００ｍ／ｗｉｎ以上）で作動を開始する。ダミーパー１８に接触した溶湯２の部 分は凝固し、ダミーパー１８の下降移動によゲＣ１凝固した溶湯２を非凝固状態 の鋳片４と共に引抜く。鋳片４とその航跡の溶湯２とを有するダし一バー１８は 磁場用構造物の内壁で囲まれた空間１６に入る。該空間内において磁力が最大と なった磁場用構造物の磁場によって鋳片は特定の断面積となる。Molten metal such as aluminum or aluminum-based alloys is placed in Tanditsh 1. Hot water is poured. If the melt is in a state suitable for continuous casting processing, this condition maintained during the manufacturing process. The tensioning means for tensioning the dummy par 18 has a specific casting speed (2 00m/win or more). Part of molten metal 2 in contact with dummy par 18 The solidified molten metal 2 is solidified by the downward movement of the dummy par 18. It is pulled out together with the slab 4. The dashi bar 18 has the slab 4 and the molten metal 2 in its wake. The user enters a space 16 surrounded by the inner wall of the magnetic field structure. The magnetic force is maximum within the space. The slab has a specific cross-sectional area due to the magnetic field of the magnetic field structure.
２次冷却帯８と断面積を減小した冷却液循環室９．１０とから空間１６に入る冷 却液は鋳片４の幅に亘って一定の圧力を有する。冷却液は鋳片４の凝固を速め、 固液界面１７は高速鋳造の場合でも磁場用構造物５の内壁で囲まれた空間１６内 に滞在する。その結果、空間を離れる時に鋳片４は所定の形状に保たれる。The cooling that enters the space 16 from the secondary cooling zone 8 and the coolant circulation chamber 9.10 with a reduced cross-sectional area The coolant has a constant pressure across the width of the slab 4. The cooling liquid accelerates the solidification of the slab 4, The solid-liquid interface 17 is located within the space 16 surrounded by the inner wall of the magnetic field structure 5 even during high-speed casting. Stay in. As a result, the slab 4 is kept in a predetermined shape when leaving the space.
薄肉鋳片４を連続鋳造する装置の能力を高めるには、磁場内における鋳片の冷却 を強めねばならない。このために鋳片４の周りに補助の冷却液循環室を設けて、 半径方向の流路１５の列数を増加させる。In order to improve the ability of the device to continuously cast thin slabs 4, cooling of the slabs in a magnetic field is necessary. must be strengthened. For this purpose, an auxiliary coolant circulation chamber is provided around the slab 4, The number of rows of channels 15 in the radial direction is increased.
産業上の利用可能性 磁場内における薄肉鋳片の連続鋳造装置は、金属及びその合金から薄肉鋳片を鋳 造する冶金学に利用することができる。Industrial applicability Continuous casting equipment for thin-walled slabs in a magnetic field casts thin-walled slabs from metals and their alloys. It can be used in metallurgy to produce.
本発明の装置をアルミニウム及びアルミニウム基合金の薄肉鋳片の鋳造に使用す ると好都合である。The apparatus of the present invention is used for casting thin-walled slabs of aluminum and aluminum-based alloys. It is convenient.
手続補正書（方式） 平成３年１１月 ７日Procedural amendment (formality) November 7, 1991
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/SU1989/000129 WO1990014182A1 (en) | 1989-05-19 | 1989-05-19 | Device for continuous casting of thin strip in a magnetic field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04500630A true JPH04500630A (en) | 1992-02-06 |
Family
ID=21617468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP50913389A Pending JPH04500630A (en) | 1989-05-19 | 1989-05-19 | Continuous casting equipment for thin slabs in a magnetic field |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH04500630A (en) |
| DE (1) | DE3991669T1 (en) |
| WO (1) | WO1990014182A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05318031A (en) * | 1992-05-12 | 1993-12-03 | Yoshida Kogyo Kk <Ykk> | Method for cooling in continuous casting, and device and mold therefor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU508332A1 (en) * | 1974-11-10 | 1976-03-30 | Предприятие П/Я Р-6585 | Device for continuous casting of metal |
| US4135568A (en) * | 1977-11-15 | 1979-01-23 | Reynolds Metals Company | Shield for electromagnetic continuous casting system |
| US4351384A (en) * | 1979-09-24 | 1982-09-28 | Kaiser Aluminum & Chemical Corporation | Coolant control in EM casting |
-
1989
- 1989-05-19 JP JP50913389A patent/JPH04500630A/en active Pending
- 1989-05-19 WO PCT/SU1989/000129 patent/WO1990014182A1/en active Application Filing
- 1989-05-19 DE DE19893991669 patent/DE3991669T1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| WO1990014182A1 (en) | 1990-11-29 |
| DE3991669T1 (en) | 1991-08-29 |
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