JPH0221289B2 - - Google Patents
Info
- Publication number
- JPH0221289B2 JPH0221289B2 JP61081844A JP8184486A JPH0221289B2 JP H0221289 B2 JPH0221289 B2 JP H0221289B2 JP 61081844 A JP61081844 A JP 61081844A JP 8184486 A JP8184486 A JP 8184486A JP H0221289 B2 JPH0221289 B2 JP H0221289B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- hollow fiber
- treated
- opening
- outlet
- 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 - Lifetime
Links
- 239000007788 liquid Substances 0.000 claims description 64
- 239000012510 hollow fiber Substances 0.000 claims description 48
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 239000012466 permeate Substances 0.000 description 12
- 238000001914 filtration Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 235000015203 fruit juice Nutrition 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 235000018102 proteins Nutrition 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Filtration Of Liquid (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は中空糸を用いた過装置、特に中空糸
が劣化したり、目づまりしたり、破損した場合に
中空糸が交換可能なカートリツジ型の過装置に
関するものである。本発明装置は果汁、タンパ
ク、糖類の濃縮、精製、回収または水、水溶液、
有機液体の過あるいは工場廃水の処理などに使
用することができる。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a filtration device using hollow fibers, particularly a cartridge type device in which the hollow fibers can be replaced when the hollow fibers deteriorate, become clogged, or are damaged. The invention relates to the The device of the present invention is capable of concentrating, purifying, and recovering fruit juice, proteins, and sugars, or
It can be used to filter organic liquids or treat industrial wastewater.
（従来の技術）
従来より一端を閉塞し、他端を開口した多数の
中空糸の開口端を接着剤で集束固定した中空糸カ
ートリツジを用いた過装置が知られている（例
えば特開昭50−149587号など）。しかしながら、
このような装置は被処理液の入口と透過液の出口
が筐体とヘツダー室を有する蓋体にそれぞれ設け
られているため、一度装置の入口と出口に配管を
取り付けると配管を取り外さない限り中空糸カー
トリツジの取り替えは困難であつた。上記欠点を
解消するため本願出願人は実開昭56−73501号に
中空糸の一端を閉塞し、他端を開口して、該開口
端部を接着剤で集束固定した中空カートリツジ
と、被処理液の入口および透過液の出口を有し、
かつ該中空糸カートリツジを収容する筐体と、ヘ
ツダー室を有する蓋体を備えた過装置を提案し
た。かかる装置は被処理液の入口と透過液の出口
を筐体に設けているので、装置に配管を取り付け
た後でも配管を取り外さずに蓋体を取り外すのみ
で中空糸カートリツジを筐体の上部に抜き出して
新しい中空糸カートリツジと取り替えることがで
きる。(Prior Art) Conventionally, there has been known a filtering device using a hollow fiber cartridge in which the open ends of a large number of hollow fibers, one end of which is closed and the other end of which is closed, are bundled and fixed with adhesive (for example, Japanese Patent Application Laid-Open No. −149587, etc.). however,
In such a device, the inlet for the liquid to be treated and the outlet for the permeate are provided in the housing and the lid, which has a header chamber. It was difficult to replace the thread cartridge. In order to eliminate the above-mentioned drawbacks, the applicant of the present application disclosed in Utility Model Application No. 56-73501 a hollow fiber cartridge in which one end of the hollow fiber is closed, the other end is opened, and the open end is fixed with an adhesive, and having a liquid inlet and a permeate outlet;
The present invention also proposed a filter device that includes a casing for accommodating the hollow fiber cartridge and a lid having a header chamber. Since such equipment has an inlet for the liquid to be treated and an outlet for the permeated liquid in the housing, even after installing the piping to the equipment, the hollow fiber cartridge can be placed in the upper part of the housing by simply removing the lid without removing the piping. It can be removed and replaced with a new hollow fiber cartridge.
（発明が解決しようとする課題）
上記装置では中空糸カートリツジを上部に抜き
出すために装置上部に中空糸カートリツジを取り
出すだけの空間を設ける必要がある。しかしこの
ような空間を設けることは狭い現場では実際上困
難である。またケーク等の付着したカートリツジ
を取り出すと透過液側と、装置周辺が汚染される
という問題があつた。(Problems to be Solved by the Invention) In the above-mentioned apparatus, in order to extract the hollow fiber cartridge to the upper part, it is necessary to provide a space in the upper part of the apparatus that is large enough to extract the hollow fiber cartridge. However, it is practically difficult to provide such a space in a narrow site. Further, there was a problem in that when a cartridge with cake or the like adhered to it was removed, the permeate side and the vicinity of the apparatus were contaminated.
したがつて本発明の目的は装置を配管から取り
外すことなく中空糸カートリツジを容易に取り替
えることのできる過装置を提供することであ
る。 SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a filter device in which hollow fiber cartridges can be easily replaced without removing the device from the piping.
（課題を解決するための手段）
本発明の装置は先端が封止された多数の中空糸
の他端を各中空糸が開口するように接着剤で集束
固定し、かつ集束固定部の先端に小径の突出部を
有するキヤツプ体を接続した中空糸カートリツジ
と、上記中空糸カートリツジが収納される筐体
と、側壁に被処理液入口と透過液出口を有し、か
つ底壁の中心に該透過液出口または被処理液入口
と連通する第１の開口及び該第１の開口から離れ
た位置に被処理液入口または過液出口と連通す
る第２の開口を設けた蓋体を具備し、上記中空糸
カートリツジの集束固定部に接続されたキヤツプ
体の先端に設けられた小径の突出部を蓋体の底壁
に設けられた第１の開口内に液密に挿着したこと
を特徴とする過装置である。(Means for Solving the Problems) The device of the present invention collects and fixes the other ends of a large number of hollow fibers whose tips are sealed with an adhesive so that each hollow fiber is open, and then A hollow fiber cartridge to which a cap body having a small-diameter protrusion is connected; a housing in which the hollow fiber cartridge is housed; The lid body is provided with a first opening that communicates with the liquid outlet or the liquid to be treated inlet, and a second opening that communicates with the liquid to be treated or the liquid outlet at a position apart from the first opening, A small-diameter protrusion provided at the tip of the cap body connected to the focusing fixing part of the hollow fiber cartridge is fluid-tightly inserted into the first opening provided in the bottom wall of the lid body. It is a passing device.
（作用）
本発明装置では被処理液入口と透過液出口を蓋
体に設けることにより、配管ラインへの装置の取
り付けが容易で、また中空糸カートリツジを交換
する際には筐体と中空糸カートリツジを同じ方向
に着脱するため、着脱時のスペースが僅かでよい
うえ、中空糸カートリツジの交換時に透過液側が
汚染され難いという利点を有している。(Function) By providing the inlet of the liquid to be treated and the outlet of the permeated liquid in the lid of the device of the present invention, it is easy to attach the device to the piping line, and when replacing the hollow fiber cartridge, the casing and the hollow fiber cartridge can be easily installed. Since the cartridges are attached and detached in the same direction, only a small amount of space is required for attachment and detachment, and the permeate side is less likely to be contaminated when replacing the hollow fiber cartridge.
（実施例）
次に本発明の過装置の一実施例を図面にて説
明する。第１図に示すように本発明装置は中空糸
カートリツジ３と、該中空糸カートリツジを収容
する筐体１、及び該筐体の上端に取着される蓋体
２で構成されている。(Embodiment) Next, an embodiment of the passing device of the present invention will be described with reference to the drawings. As shown in FIG. 1, the apparatus of the present invention comprises a hollow fiber cartridge 3, a housing 1 housing the hollow fiber cartridge, and a lid 2 attached to the upper end of the housing.
中空糸カートリツジを構成する中空糸として
は、多数の中空糸の下端開口を接着剤で閉塞した
もの、あるいは中空糸の下端をループ状に形成し
て先端を封止したものであり、中空糸の上端は接
着剤で集束固定されている。上記多数の中空糸の
収束固定部の先端には小径の突出部９を有するキ
ヤツプ体４が接続される。そして通常この突出部
にＯリングを収納する環状溝が設けられる。 The hollow fibers constituting the hollow fiber cartridge are those in which the lower end openings of a large number of hollow fibers are closed with adhesive, or the lower ends of the hollow fibers are formed into a loop shape and the tips are sealed. The upper end is fixed with adhesive. A cap body 4 having a small-diameter protrusion 9 is connected to the tip of the converging and fixing portion of the large number of hollow fibers. This protrusion is usually provided with an annular groove for housing the O-ring.
上部に開口を有する筐体１は底部に被処理液の
排出口２１を有している。 The housing 1 having an opening at the top has a discharge port 21 for the liquid to be treated at the bottom.
一方筐体１と液密に取着される蓋体２は、その
底部の中心に透過液出口または被処理液入口１３
に連通する第１の開口が設けられている。また該
第１の開口から離れた位置に被処理液入口または
透過液出口１４に連通する第２の開口が設けられ
ている。上記透過液出口または被処理液入口１３
と被処理液入口または透過液出口１４は蓋体内で
90°流路を変えてそれぞれ第１及び第２の開口と
連通している。透過液出口または被処理液入口１
３と被処理液入口または透過液出口１４はそれぞ
れ透過液導出管または被処理液入口管（図示せ
ず）と被処理液導入管または透過液出口管（図示
せず）に接続される。通常透過液出口または被処
理液入口１３と被処理液入口または透過液出口１
４は同一直線上（インライン）に設けられる。 On the other hand, the lid body 2, which is attached liquid-tightly to the housing 1, has a permeate outlet or a to-be-treated liquid inlet 13 at the center of its bottom.
A first opening communicating with is provided. Further, a second opening communicating with the treated liquid inlet or the permeated liquid outlet 14 is provided at a position away from the first opening. The permeated liquid outlet or treated liquid inlet 13
and the inlet of the liquid to be treated or the outlet of the permeate 14 inside the lid.
The flow paths are changed by 90 degrees and communicate with the first and second openings, respectively. Permeate outlet or treated liquid inlet 1
3 and the treated liquid inlet or permeated liquid outlet 14 are respectively connected to a permeated liquid outlet pipe or a treated liquid inlet pipe (not shown) and a treated liquid inlet pipe or a permeated liquid outlet pipe (not shown). Usually permeated liquid outlet or treated liquid inlet 13 and treated liquid inlet or permeated liquid outlet 1
4 are provided on the same straight line (inline).
また被処理液入口または透過液出口１４及び透
過液出口または被処理液入口１３は必要に応じて
蓋体２の上壁または側壁の同一方向に設けてもよ
い。上記透過液出口または被処理液入口１３と連
通する第１の開口には、中空糸カートリツジ３の
集束固定部５に接続されたキヤツプ体４の小径突
出部９が挿着される。そして該小径突出部９と蓋
体に設けられた第１の開口はシール部材、例えば
平パツキンやＯリング１５によりシールされる。
１７は筐体１と蓋体２をパツキン１８を介して液
密に連結するバンドカツプリングである。これら
のパツキン１８とＯリング１５によつて被処理液
室または透過液室１９と透過液室または被処理液
室２０は中空糸の壁膜をへだてて液密構造となつ
ている。本発明装置では被処理液を中空糸の外部
に導入すれば外圧過として用いることができ
る。また中空糸の内部に導入すれば内圧過とし
て用いることができる。例えば外圧全過では被
処理液は被処理液入口１４より中空糸３の外側の
被処理液室１９に入る。中空糸を透過した透過液
は中空糸内側の通路を通り透過液室２０に集めら
れキヤツプ体４を通つて透過液出口１３より取り
出される。 Further, the treated liquid inlet or permeated liquid outlet 14 and the permeated liquid outlet or treated liquid inlet 13 may be provided in the same direction on the top wall or side wall of the lid body 2, if necessary. A small-diameter protrusion 9 of the cap body 4 connected to the convergence fixing part 5 of the hollow fiber cartridge 3 is inserted into the first opening communicating with the permeated liquid outlet or the treated liquid inlet 13. The small-diameter protrusion 9 and the first opening provided in the lid are sealed by a sealing member, such as a flat packing or an O-ring 15.
Reference numeral 17 denotes a band coupling that liquid-tightly connects the housing 1 and the lid 2 via a gasket 18. By means of the packing 18 and the O-ring 15, the treated liquid chamber or permeated liquid chamber 19 and the permeated liquid chamber or treated liquid chamber 20 have a liquid-tight structure by separating the wall membrane of the hollow fiber. The apparatus of the present invention can be used as an external pressure filter by introducing the liquid to be treated outside the hollow fiber. Moreover, if it is introduced inside the hollow fiber, it can be used as an internal pressure filter. For example, when the external pressure is completely passed, the liquid to be treated enters the liquid to be treated chamber 19 outside the hollow fiber 3 through the liquid to be treated inlet 14 . The permeate that has permeated through the hollow fiber passes through a passage inside the hollow fiber, is collected in a permeate chamber 20, passes through a cap 4, and is taken out from a permeate outlet 13.
またキヤツプ体の先端に設けられた小径の突出
部９に複数の環状溝を設け、該環状溝にＯリング
１５を収容して、該Ｏリング１５間に漏出液出口
を開口さててもよい。かかる装置では被処理液が
透過液側に漏出する部位は蓋体２の底壁に設けら
れた透過液出口１３に連通する第１の開口と、該
第１の開口内に挿入された中空糸カートリツジ３
の集束固定部５に接続されたキヤツプ体４の小径
の突出部９との〓間からであるが、該〓間は２つ
のＯリング１５で完全にシールされているので、
上記Ｏリングが例え破損してシール性を失つたと
しても、加圧側の被処理液が蓋体の側壁に穿設さ
れた大気開放の漏出液出口より外部に流出するた
め被処理液が透過液側へ漏れることはない。また
被処理液が漏出液出口より外部に流出するため作
業員または適当な測定装置により漏れを検知する
ことができる。キヤツプ体の小径突出部にＯリン
グを３ケ装着した場合にはそれぞれのＯリング間
と連通する漏出液出口を設けることが好ましい。
かかる複数の漏出液出口を設けることによりどの
Ｏリングがシール性を失つたかを直ちに検知する
ことができる。 Alternatively, a plurality of annular grooves may be provided in the small diameter protrusion 9 provided at the tip of the cap body, O-rings 15 may be accommodated in the annular grooves, and the leakage liquid outlet may be opened between the O-rings 15. In such an apparatus, the part from which the liquid to be treated leaks to the permeate side is a first opening that communicates with the permeate outlet 13 provided on the bottom wall of the lid 2, and a hollow fiber inserted into the first opening. Cartridge 3
This is from between the small diameter protrusion 9 of the cap body 4 connected to the focusing fixing part 5 of
Even if the O-ring is damaged and loses its sealing properties, the liquid to be treated on the pressurized side will flow out through the leakage liquid outlet that is open to the atmosphere and is drilled in the side wall of the lid, so the liquid to be treated will be the permeated liquid. It will not leak to the side. Further, since the liquid to be treated flows out from the leakage liquid outlet, leakage can be detected by an operator or an appropriate measuring device. When three O-rings are attached to the small-diameter protrusion of the cap, it is preferable to provide a leakage liquid outlet communicating with each O-ring.
By providing such a plurality of leakage liquid outlets, it is possible to immediately detect which O-ring has lost its sealing properties.
中空糸が劣化したり、目詰りしたときにはまず
筐体内に残留する被処理液を排出口２１より抜き
出した後、バンドカツプリング１７を蓋体２から
取り外して蓋体２と筐体１を分離する。そして中
空糸カートリツジ３を筐体から抜き取る。その後
新しい中空糸カートリツジのキヤツプ体の先端に
設けられた小径の突出部９を蓋体２に設けられた
第１の開口に挿着した後、筐体１を中空糸カート
リツジを介して蓋体に取着する。 When the hollow fibers deteriorate or become clogged, the liquid to be treated remaining in the housing is first extracted from the discharge port 21, and then the band coupling 17 is removed from the lid 2 to separate the lid 2 and the housing 1. . Then, the hollow fiber cartridge 3 is removed from the housing. After that, after inserting the small diameter protrusion 9 provided at the tip of the cap body of a new hollow fiber cartridge into the first opening provided in the lid body 2, the housing 1 is attached to the lid body through the hollow fiber cartridge. Attach.
上記装置は通常第１図に示すように蓋体が筐体
の上部に配置された状態で使用されるが、装置の
取り付け場所により倒立あるいは水平状態で使用
されることがある。この場合には第１図に示す筐
体内の被処理液の排出口２１を被処理液入口とし
て被処理液管と接続し、蓋体に設けられた被処理
液入口を排出口として使用することが好ましい。 The above-mentioned device is usually used with the lid disposed on the top of the housing as shown in FIG. 1, but depending on where the device is installed, it may be used in an inverted or horizontal position. In this case, the discharge port 21 for the liquid to be treated in the housing shown in Fig. 1 should be connected to the liquid to be treated pipe as the inlet for the liquid to be treated, and the inlet for the liquid to be treated provided in the lid body should be used as the outlet. is preferred.
（発明の効果）
以上のように本発明の過装置は被処理液入口
と透過液出口を蓋体に設けたためラインに簡単に
取り付けることができ、かつ中空糸カートリツジ
の取付け、取外しのためのスペースが小さくてす
む。さらに中空糸及び筐体、蓋体の素材に耐熱性
の樹脂を用いると滅菌又は殺菌が容易に行うこと
ができるという優れた効果を有している。(Effects of the Invention) As described above, the filtration device of the present invention has the inlet of the liquid to be treated and the outlet of the permeated liquid in the lid, so it can be easily installed on the line, and there is also space for installing and removing the hollow fiber cartridge. can be small. Furthermore, if heat-resistant resin is used for the hollow fibers, the housing, and the lid, sterilization or sterilization can be easily performed, which is an excellent effect.
第１図は本発明装置の一実施例を示す断面図で
ある。
１……筐体、２……蓋体、３……中空糸カート
リツジ、４……キヤツプ体、５……集束固定部、
１３……透過液出口、１４……被処理液入口、１
５……Ｏリング。
FIG. 1 is a sectional view showing an embodiment of the device of the present invention. DESCRIPTION OF SYMBOLS 1... Housing, 2... Lid body, 3... Hollow fiber cartridge, 4... Cap body, 5... Focusing fixing part,
13... Permeated liquid outlet, 14... Treated liquid inlet, 1
5...O-ring.
Claims (1)
空糸が開口するように接着剤で集束固定し、かつ
該集束固定部の先端に小径の突出部を有するキヤ
ツプ体が接続された中空糸カートリツジと、上記
中空糸カートリツジが収納される筐体と、側壁に
被処理液入口と透過液出口を有し、かつ底壁の中
心に該透過液出口または被処理液入口と連通する
第１の開口及び該第１の開口から離れた位置に被
処理液入口または透過液出口と連通する第２の開
口を設けた蓋体を具備し、上記中空糸カートリツ
ジの集束固定部に接続されたキヤツプ体の先端に
設けられた小径の突出部を、蓋体の底壁に設けら
れた第１の開口内に液密に挿着したことを特徴す
る過装置。1. The other ends of a large number of hollow fibers whose tips are sealed are bundled and fixed with an adhesive so that each hollow fiber is open, and a cap body having a small diameter protrusion is connected to the tip of the bundled and fixed part. a hollow fiber cartridge; a housing in which the hollow fiber cartridge is housed; The lid body is provided with a first opening and a second opening that communicates with the inlet of the liquid to be treated or the outlet of the permeated liquid at a position apart from the first opening, and is connected to the focusing fixing part of the hollow fiber cartridge. A cap device characterized in that a small-diameter protrusion provided at the tip of a cap body is fluid-tightly inserted into a first opening provided in a bottom wall of a lid body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61081844A JPS61234905A (en) | 1986-04-08 | 1986-04-08 | Filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61081844A JPS61234905A (en) | 1986-04-08 | 1986-04-08 | Filter |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58033302A Division JPS59160511A (en) | 1983-02-28 | 1983-02-28 | Filter device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61234905A JPS61234905A (en) | 1986-10-20 |
| JPH0221289B2 true JPH0221289B2 (en) | 1990-05-14 |
Family
ID=13757783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61081844A Granted JPS61234905A (en) | 1986-04-08 | 1986-04-08 | Filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61234905A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0628162U (en) * | 1992-09-14 | 1994-04-15 | ケージーパルテック株式会社 | Joiner sliding device |
| US11852012B2 (en) | 2017-06-28 | 2023-12-26 | Merlin Technology, Inc. | Advanced passive interference management in directional drilling system, apparatus and methods |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6430605A (en) * | 1987-07-28 | 1989-02-01 | Daicel Chem | Hollow yarn-type ultrafilter membrane cartridge filter |
| JPH038349Y2 (en) * | 1987-11-16 | 1991-02-28 | ||
| US8795526B2 (en) | 2008-01-31 | 2014-08-05 | Toray Industries, Inc. | Hollow fiber membrane element, frame for hollow fiber membrane element, and membrane filtration apparatus |
| JP6615969B1 (en) | 2018-09-26 | 2019-12-04 | 日東電工株式会社 | Hollow fiber membrane module |
| JP7293069B2 (en) * | 2019-09-25 | 2023-06-19 | 日東電工株式会社 | Hollow fiber membrane module |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3228527A (en) * | 1961-05-17 | 1966-01-11 | Maremont Corp | Water separating fuel filter |
| JPS5673501A (en) * | 1979-11-19 | 1981-06-18 | Sankei Sangyo Kk | Removing method of water content in liquid oil by evacuated distillation |
| JPS56129016A (en) * | 1979-11-05 | 1981-10-08 | Rimipoa Corp | Filter cartridge and method of manufacturing said filter cartridge and its forming element |
-
1986
- 1986-04-08 JP JP61081844A patent/JPS61234905A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3228527A (en) * | 1961-05-17 | 1966-01-11 | Maremont Corp | Water separating fuel filter |
| JPS56129016A (en) * | 1979-11-05 | 1981-10-08 | Rimipoa Corp | Filter cartridge and method of manufacturing said filter cartridge and its forming element |
| JPS5673501A (en) * | 1979-11-19 | 1981-06-18 | Sankei Sangyo Kk | Removing method of water content in liquid oil by evacuated distillation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0628162U (en) * | 1992-09-14 | 1994-04-15 | ケージーパルテック株式会社 | Joiner sliding device |
| US11852012B2 (en) | 2017-06-28 | 2023-12-26 | Merlin Technology, Inc. | Advanced passive interference management in directional drilling system, apparatus and methods |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61234905A (en) | 1986-10-20 |
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