JPS647325Y2 - - Google Patents
Info
- Publication number
- JPS647325Y2 JPS647325Y2 JP1981042452U JP4245281U JPS647325Y2 JP S647325 Y2 JPS647325 Y2 JP S647325Y2 JP 1981042452 U JP1981042452 U JP 1981042452U JP 4245281 U JP4245281 U JP 4245281U JP S647325 Y2 JPS647325 Y2 JP S647325Y2
- Authority
- JP
- Japan
- Prior art keywords
- resistant material
- slag
- tube
- wire
- heat
- 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
- 239000002893 slag Substances 0.000 claims description 42
- 239000002184 metal Substances 0.000 claims description 41
- 229910052751 metal Inorganic materials 0.000 claims description 41
- 239000003779 heat-resistant material Substances 0.000 claims description 26
- 239000004568 cement Substances 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims 2
- 238000004804 winding Methods 0.000 claims 2
- 238000000034 method Methods 0.000 description 4
- 239000007769 metal material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000005028 tinplate Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
- Sampling And Sample Adjustment (AREA)
Description
【考案の詳細な説明】
本考案は溶融金属槽に於て浮遊するスラグの成
分分析試料を採取するスラグサンプラーに関す
る。[Detailed Description of the Invention] The present invention relates to a slag sampler for collecting samples for component analysis of slag floating in a molten metal tank.
周知の如く、近年鉄鋼精練法の進歩にはめざま
しいものがある。特に温度測定、酸素・炭素等の
成分測定、又含有成分測定のサンプラー等も多く
開発され用いられている。 As is well known, there have been remarkable advances in steel refining methods in recent years. In particular, many samplers for measuring temperature, measuring components such as oxygen and carbon, and measuring contained components have been developed and used.
更に精練効率の向上と資源の有効利用化は、溶
融金属に浮遊するスラグの温度や成分を迅速に知
り、投入原料の部止りを向上させようとする試み
となつて表われてきている。 Furthermore, improvements in scouring efficiency and effective use of resources have been made possible by attempts to quickly determine the temperature and composition of slag floating in molten metal and to improve the retention of input raw materials.
一般に、溶融金属の温度測定は、熱電対を紙管
等より成る棒材の先端に取り付け、溶融金属中に
浸漬することによつて行なわれる。この種の測温
装置としては、熱電対を組込んだ消耗型ユニツト
を非消耗部品であるホルダーの先端に取り付け、
各測定後ごとに消耗型ユニツトの部分を交換する
ようにしたものが用いられている。一方、試料採
取の方法としては、必要な試料が溶融金属の中央
部のものの場合、消耗型ユニツト内部に試料採取
室を設け、溶融金属中にユニツト壁部の試料導入
孔からこの室内へと溶融金属を導入する方法が用
いられているが、必要な試料がスラグである場合
の試料採取方法としては、紙管からなる棒状の外
周の一部に金属製耐熱材を嵌装し、溶融金属中へ
の浸漬中にこの金属製耐熱材にスラグを附着せし
め、このスラグを附着したままの棒材を溶融金属
槽から引き抜いて、この棒材から試料を分離採取
する方法が提案されている。 Generally, the temperature of molten metal is measured by attaching a thermocouple to the tip of a bar made of a paper tube or the like and immersing it in the molten metal. This type of temperature measuring device has a consumable unit with a built-in thermocouple attached to the tip of a holder, which is a non-consumable part.
A consumable unit is used in which parts are replaced after each measurement. On the other hand, when the sample is taken from the center of the molten metal, a sample collection chamber is provided inside the consumable unit, and the molten metal is poured into this chamber from the sample introduction hole in the wall of the unit. A method of introducing metal is used, but when the required sample is slag, a method for collecting a sample is to fit a heat-resistant metal material into a part of the outer periphery of a rod-shaped paper tube and insert it into the molten metal. A method has been proposed in which slag is attached to the metal heat-resistant material during immersion in the molten metal, the bar with the slag still attached is pulled out of the molten metal bath, and a sample is separated from the bar.
しかしながら、金属製耐熱材を用いる既知のス
ラグサンプラーでは保持部棒材を構成する紙管が
スラグの高熱と反応し、スプラツシユ等を出す
為、金属製耐熱材に附着するスラグの量が少なか
つた。又該サンプラーは従来より用いられている
測温装置、湯面位置検出装置、溶鋼サンプラー等
と組合わせて用いられる場合が多く、この場合一
般に機械装置を介して用いられるが、これらはそ
の性格上紙管より成る棒材構成が出来るだけ細く
されており、これにスラグサンプラーを付した場
合、この分だけ肉厚が薄くなり、使用時に回収を
不可とする場合があつた。特に転炉中よりスラグ
をサンプリングする場合はこの事が顕著であつ
た。更に転炉に於ては任意の個所に於けるスラグ
のサンプリングが出来ない、などの欠点があつ
た。 However, in known slag samplers that use heat-resistant metal materials, the paper tube that makes up the holding bar reacts with the high heat of the slag and produces splashes, resulting in a small amount of slag adhering to the heat-resistant metal material. . In addition, the sampler is often used in combination with conventionally used temperature measuring devices, hot water level position detecting devices, molten steel samplers, etc. In this case, it is generally used via mechanical devices, but due to their nature, these samplers are used in combination with The bar made of a paper tube is made as thin as possible, and when a slag sampler is attached to it, the wall thickness becomes thinner by that amount, making it sometimes impossible to recover it during use. This was especially noticeable when sampling slag from inside the converter. Furthermore, the converter has drawbacks such as the inability to sample slag at any location.
本考案の目的は上記の欠点を除去し更に採取ス
ラグの量がより多く、かつ確実なスラグサンプラ
ーを提供することにある。 The object of the present invention is to eliminate the above-mentioned drawbacks, and to provide a reliable slag sampler that can collect a larger amount of slag.
以下図面により本考案を実施例に基いて説明す
る。 The present invention will be explained below based on embodiments with reference to the drawings.
第１図において、１および４，５は棒材を形成
する要素であつて、必要肉厚の紙管より成つてい
る。それぞれ１は内管、４は外管、５は外管であ
る。内管１の先端部にはセンサー２が固定されて
いる。センサー２は周知の湯面位置検出機能を持
つたもの、又温度検知機能を持つたものいずれで
もよい。３はセンサー２に取付けられた電気コネ
クターで、図示してないが対応するコネクターを
介して温度表示又はその他必要計器に接続され
る。このスラグサンプラーを自動機械装置を用い
て浸漬する場合、センサー２がスラグ面又は初期
温度の検知を行うので、これより採取すべきスラ
グ層位置及び溶銅温度測定位置を自動的に判断さ
せることができる。自動機械装置を用いなく人手
による場合でスラグサンプリングのみの場合は、
センサー２はなくして別に栓体を固着させてもよ
い。 In FIG. 1, numerals 1, 4, and 5 are elements forming a bar, which are made of paper tubes having the necessary wall thickness. 1 is an inner tube, 4 is an outer tube, and 5 is an outer tube. A sensor 2 is fixed to the tip of the inner tube 1. The sensor 2 may be any one having a well-known hot water level position detection function or a temperature detection function. Reference numeral 3 denotes an electrical connector attached to the sensor 2, which is connected to a temperature display or other necessary instrument via a corresponding connector (not shown). When this slag sampler is immersed using an automatic mechanical device, the sensor 2 detects the slag surface or initial temperature, so it is possible to automatically determine the slag layer position to be sampled and the molten copper temperature measurement position from this. can. If slag sampling is done manually without using automatic machinery,
The sensor 2 may be omitted and a stopper may be fixed separately.
外管４の長さはセンサー２の種類によつて異な
るが、例えば転炉内で使用する場合、センサー２
が温度センサーであれば、700mm程度である。 The length of the outer tube 4 varies depending on the type of sensor 2, but for example, when used in a converter, the length of the outer tube 4 varies depending on the type of sensor 2.
If it is a temperature sensor, it is about 700mm.
棒材の外周一部には針金状金属製耐熱材６が巻
きつけられ、この耐熱材６の隣り合う巻回間の位
置には耐熱材各巻回の外周一部を露出させる状態
にセメント７が塗布される。このセメント７は針
金状金属製耐熱材６を固定するとともにスラグ附
着量を増せるようにする働らきをする。耐熱材６
は鉄からなるのが好ましい。 A wire-like metal heat-resistant material 6 is wrapped around a part of the outer periphery of the bar, and cement 7 is placed between adjacent turns of the heat-resistant material 6 so that a part of the outer periphery of each turn of the heat-resistant material is exposed. applied. This cement 7 has the function of fixing the wire-like metal heat-resistant material 6 and increasing the amount of slag attached. Heat resistant material 6
is preferably made of iron.
内管１と外管４及び外管５の間には、薄肉金属
筒８が外管４及び外管５に充分重なるように装入
固定される。薄肉金属筒８の仕様は特別のもので
ある必要はなく、例えば0.25mm程度のブリキ板を
まるめたものを使用することができる。薄肉金属
管８を設ける理由は、内管１の肉厚が薄くこのサ
ンプラーの使用時に外管４、外管５の中間部で分
離し、せつかく採取したスラグを落下させてしま
がないようにするためと、針金状金属製耐熱材６
に附着したスラグをセメント７の薄層を介して急
激に冷却固化させることにある。なお、薄肉金属
管８の外管４，５との重なり部分は分離防止と固
定のためのもので、外管４，５の固定は例えばス
テープル、針等を打込むことによつて行われる。 A thin metal tube 8 is inserted and fixed between the inner tube 1 and the outer tubes 4 and 5 so as to sufficiently overlap the outer tubes 4 and 5. The specifications of the thin metal cylinder 8 do not need to be special; for example, a rounded tin plate of about 0.25 mm can be used. The reason for providing the thin-walled metal tube 8 is to prevent the inner tube 1 from being separated at the middle of the outer tube 4 and the outer tube 5 when the sampler is used because the wall thickness of the inner tube 1 is thin so that the slag that has been collected with great effort will not fall. and wire-like metal heat-resistant material 6
The purpose is to rapidly cool and solidify the slag adhering to the cement 7 through the thin layer of cement 7. Note that the overlapping portion of the thin metal tube 8 with the outer tubes 4 and 5 is for preventing separation and fixing, and fixing of the outer tubes 4 and 5 is performed by, for example, driving staples, needles, etc.
針金状金属製耐熱材６としては、例えば直径が
４mmの軟鉄棒をピツチ８、自由長498mmのコイル
を作成したものが用いられ、これを内管１への外
管５の装入前に装入することによつて取付ける。 As the wire-like metal heat-resistant material 6, for example, a soft iron rod with a diameter of 4 mm is used to create a coil with a pitch 8 and a free length of 498 mm, and this is loaded before inserting the outer tube 5 into the inner tube 1. Attach by inserting.
セメント７としては採取スラグ成分の分析に影
響を与えない例えば日本特殊炉材株式会社製HH
−18C型セメントが用いられる。セメント７は前
述した固定およびスラグ附着量増加の働らきの外
に、金属槽内の高熱及びスラグ熱等より薄肉金属
管８を保護する働らきもし、その保護および附着
したスラグの冷却固化のための薄肉金属筒８への
伝熱を考慮に入れて、保護作用を与えるに必要な
だけ厚くしかも伝熱作用を与えるに必要なだけ薄
い範囲内で薄く塗られる。従つて、セメント７は
耐熱材６の各巻回の外周一部を残すように塗られ
る。第２図は耐熱材６が巻きつけられる棒材部分
をより明確に示している。 As cement 7, for example, HH manufactured by Japan Tokushu Rozai Co., Ltd., which does not affect the analysis of collected slag components.
−18C type cement is used. In addition to the above-mentioned functions of fixing and increasing the amount of slag adhesion, the cement 7 also has the function of protecting the thin-walled metal tube 8 from the high heat in the metal tank, slag heat, etc., and is used to protect the thin-walled metal pipe 8 and to cool and solidify the adhering slag. Taking into account the heat transfer to the thin metal cylinder 8, the coating is applied as thinly as necessary to provide a protective effect and as thin as necessary to provide a heat transfer effect. Therefore, the cement 7 is applied so as to leave part of the outer periphery of each turn of the heat-resistant material 6. FIG. 2 more clearly shows the bar portion around which the heat-resistant material 6 is wound.
巻きつけられた金属製耐熱材６の周囲には外管
４，５の外径を越えない厚み、例えば４mm前後の
厚みの保護用紙管９が設けられる。 A protective paper tube 9 having a thickness not exceeding the outer diameter of the outer tubes 4 and 5, for example, around 4 mm, is provided around the wrapped metal heat-resistant material 6.
製造に際しては、このスラグサンプラーは内管
１に外管４を装入し、耐熱材６を装入してセメン
ト７で固定し、保護用紙管９を装入し、最後に外
管５を装入固定して完成される。 During manufacturing, this slag sampler charges the outer tube 4 into the inner tube 1, charges the heat-resistant material 6, fixes it with cement 7, inserts the protective paper tube 9, and finally inserts the outer tube 5. It is fixed and completed.
完成したサンプラーの寸法の例を挙げれば、転
炉用で使用する場合の例としてそれぞれの寸法は
全長が2000mm、外管４の長さは700mm、保護用紙
管９の長さは500mm、外管５の長さは750mmで、又
内管１の内径は56mm、外管４，５の外径は85mmで
ある。 To give an example of the dimensions of a completed sampler, for use in a converter, the total length of each sampler is 2000 mm, the length of the outer tube 4 is 700 mm, the length of the protective paper tube 9 is 500 mm, and the length of the outer tube is 500 mm. The length of tube 5 is 750 mm, the inner diameter of inner tube 1 is 56 mm, and the outer diameter of outer tubes 4 and 5 is 85 mm.
以上の説明から明解されるように、考案は、紙
管等を素材とする棒材の外周にスラグ採取用の針
金状金属製耐熱材を巻きつけたスラグサンプラー
であつてスラグ附着量を増せるようにしたものを
提供する。本考案は針金状鉄線とセメントを使用
することを特徴とする。したがつて、製造コスト
が安価となり、しかもセメントの耐熱強度は強固
であるため溶損の虞れもない。更に、スプラツシ
ユの発生を防止することができ、針金状金属製耐
熱材を固定することができ、さらにセメントの冷
却能によりスラグ採取量を増大することができ
る。更に、本考案は針金状金属製耐熱材が巻きつ
けられる棒材部分に薄肉金属筒を嵌挿する態様で
実施することによりその冷却作用を利用してさら
にスラグ附着を確実ならしめかつまた棒材の強度
を高められるので、棒材がセンサー等を取り付け
た内管を有する型のものの場合に特に有利に使用
できるものである。 As is clear from the above explanation, the proposed slag sampler is a slag sampler in which a wire-shaped metal heat-resistant material for collecting slag is wrapped around the outer circumference of a bar made of paper tube or the like, and the amount of slag attached can be increased. Provide something that looks like this. This invention is characterized by the use of wire iron wire and cement. Therefore, the manufacturing cost is low, and since the heat resistance of cement is strong, there is no risk of melting and damage. Furthermore, the generation of splash can be prevented, the wire-like metal heat-resistant material can be fixed, and the amount of slag collected can be increased due to the cooling ability of cement. Furthermore, the present invention is implemented in such a manner that a thin metal tube is inserted into the bar portion around which the wire-shaped metal heat-resistant material is wound, thereby making use of its cooling effect to further ensure slag adhesion. Since the strength of the rod can be increased, it can be used particularly advantageously when the rod has an inner tube to which a sensor or the like is attached.
第１図は本考案の一実施例に従うスラグサンプ
ラーを一部破断図にて示す断面図、第２図は第１
図に示したスラグサンプラーの針金状金属製耐熱
材が巻きつけられる部分を拡大して示す断面図で
ある。
１：棒材内管、４，５：棒材外管、６：針金状
金属製耐熱材、７：セメント、８：薄肉金属筒、
９：保護用紙管。
FIG. 1 is a partially cutaway cross-sectional view of a slag sampler according to an embodiment of the present invention, and FIG.
FIG. 2 is an enlarged sectional view showing a portion of the slag sampler shown in the figure around which a wire-like metal heat-resistant material is wound. 1: Bar inner tube, 4, 5: Bar outer tube, 6: Wire-shaped metal heat-resistant material, 7: Cement, 8: Thin metal tube,
9: Protective paper tube.
Claims (1)
製耐熱材を巻きつけ、更に、針金状金属製耐熱
材を固定しかつスラグ附着量を増せるように分
折成分に影響しないセメントを耐熱材の各巻回
の外周一部を残して隣り合う耐熱材巻回間の位
置に塗布してなるスラグサンプラー。 (2) 実用新案登録請求の範囲第１項記載のスラグ
サンプラーにおいて、針金状金属製耐熱材が鉄
からなるようにしたスラグサンプラー。 (3) 実用新案登録請求の範囲第１項記載のスラグ
サンプラーにおいて、スラグ附着量を増せるよ
うにしかつ棒材の強度を高めるように棒材と巻
きつけられた針金状金属製耐熱材の間に針金状
金属製耐熱材の両端を越えて延びる長さの薄肉
金属筒を装入固定したスラグサンプラー。 (4) 実用新案登録請求の範囲第３項記載のスラグ
サンプラーにおいて、棒材は内管およびこの内
管の外径よりも僅かに大きい内径を有しかつ２
部分に分けられて軸方向に間隔をおいて配置さ
れる外管からなり、薄肉金属筒は内管と外管の
間に少なくとも外管の２部分間の間隔を覆うよ
うに装入固定され、針金状金属製耐熱材はこの
薄肉金属筒に巻きつけられてセメントで固定さ
れ、この巻きつけられた針金状金属製耐熱材の
周囲には外管の外径を越えない厚みを有する保
護用紙管が嵌装されているようにしたスラグサ
ンプラー。[Scope of Claim for Utility Model Registration] (1) Wrapping a wire-like metal heat-resistant material around the outer periphery of a bar made of a paper tube or the like, further fixing the wire-like metal heat-resistant material and increasing the amount of slag attached. This slag sampler is made by applying cement that does not affect the fractional components between adjacent windings of heat-resistant material, leaving a part of the outer periphery of each winding of heat-resistant material. (2) A slag sampler according to claim 1 of the utility model registration, in which the wire-like metal heat-resistant material is made of iron. (3) In the slag sampler described in Claim 1 of the Utility Model Registration Claim, between the bar material and the wire-shaped metal heat-resistant material wound so as to increase the amount of slag attached and to increase the strength of the bar material. A slag sampler in which a thin metal cylinder with a length extending beyond both ends of a wire-shaped metal heat-resistant material is inserted and fixed. (4) In the slag sampler described in claim 3 of the utility model registration, the rod has an inner tube and an inner diameter slightly larger than the outer diameter of the inner tube, and
comprising an outer tube divided into sections and arranged at intervals in the axial direction, a thin metal tube inserted and fixed between the inner tube and the outer tube so as to cover at least the gap between the two sections of the outer tube; The wire-shaped metal heat-resistant material is wrapped around this thin-walled metal tube and fixed with cement, and a protective paper tube with a thickness not exceeding the outer diameter of the outer tube is placed around the wire-shaped metal heat-resistant material wrapped around it. A slag sampler fitted with
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981042452U JPS647325Y2 (en) | 1981-03-26 | 1981-03-26 | |
| KR828201286A KR880000746B1 (en) | 1981-03-26 | 1982-03-25 | Slag sampler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981042452U JPS647325Y2 (en) | 1981-03-26 | 1981-03-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57155459U JPS57155459U (en) | 1982-09-30 |
| JPS647325Y2 true JPS647325Y2 (en) | 1989-02-27 |
Family
ID=29839476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981042452U Expired JPS647325Y2 (en) | 1981-03-26 | 1981-03-26 |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS647325Y2 (en) |
| KR (1) | KR880000746B1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4509403B2 (en) * | 2000-02-18 | 2010-07-21 | ヘレーウス エレクトロ−ナイト インターナシヨナル エヌ ヴイ | Sample collection equipment for melt |
| DE102005043852B3 (en) * | 2005-09-13 | 2006-12-21 | Heraeus Electro-Nite International N.V. | Immersible probe, for use in steel processing, has sample-taking elements which have flat or concave surface facing away from immersion end and inclined to longitudinal axis in direction of end of probe body opposite immersion end |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4924456U (en) * | 1972-06-06 | 1974-03-01 | ||
| JPS5514805B2 (en) * | 1975-04-24 | 1980-04-18 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5629745Y2 (en) * | 1978-07-07 | 1981-07-15 |
-
1981
- 1981-03-26 JP JP1981042452U patent/JPS647325Y2/ja not_active Expired
-
1982
- 1982-03-25 KR KR828201286A patent/KR880000746B1/en active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4924456U (en) * | 1972-06-06 | 1974-03-01 | ||
| JPS5514805B2 (en) * | 1975-04-24 | 1980-04-18 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR880000746B1 (en) | 1988-05-04 |
| JPS57155459U (en) | 1982-09-30 |
| KR830009482A (en) | 1983-12-21 |
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