JPS59397Y2 - リバ−スサ−キユレ−シヨンドリル - Google Patents

リバ−スサ−キユレ−シヨンドリル

Info

Publication number
JPS59397Y2
JPS59397Y2 JP1980068413U JP6841380U JPS59397Y2 JP S59397 Y2 JPS59397 Y2 JP S59397Y2 JP 1980068413 U JP1980068413 U JP 1980068413U JP 6841380 U JP6841380 U JP 6841380U JP S59397 Y2 JPS59397 Y2 JP S59397Y2
Authority
JP
Japan
Prior art keywords
drill
bit body
drill pipe
expanding
shaft
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
Application number
JP1980068413U
Other languages
English (en)
Japanese (ja)
Other versions
JPS56168586U (enrdf_load_stackoverflow
Inventor
康宏 松岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daiho Corp
Original Assignee
Daiho Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daiho Corp filed Critical Daiho Corp
Priority to JP1980068413U priority Critical patent/JPS59397Y2/ja
Publication of JPS56168586U publication Critical patent/JPS56168586U/ja
Application granted granted Critical
Publication of JPS59397Y2 publication Critical patent/JPS59397Y2/ja
Expired legal-status Critical Current

Links

JP1980068413U 1980-05-19 1980-05-19 リバ−スサ−キユレ−シヨンドリル Expired JPS59397Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1980068413U JPS59397Y2 (ja) 1980-05-19 1980-05-19 リバ−スサ−キユレ−シヨンドリル

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1980068413U JPS59397Y2 (ja) 1980-05-19 1980-05-19 リバ−スサ−キユレ−シヨンドリル

Publications (2)

Publication Number Publication Date
JPS56168586U JPS56168586U (enrdf_load_stackoverflow) 1981-12-12
JPS59397Y2 true JPS59397Y2 (ja) 1984-01-07

Family

ID=29662355

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1980068413U Expired JPS59397Y2 (ja) 1980-05-19 1980-05-19 リバ−スサ−キユレ−シヨンドリル

Country Status (1)

Country Link
JP (1) JPS59397Y2 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0230551Y2 (enrdf_load_stackoverflow) * 1985-11-28 1990-08-16
JP6891913B2 (ja) 2019-03-25 2021-06-18 カシオ計算機株式会社 電子表示装置及び表示制御方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5565692A (en) * 1978-11-08 1980-05-17 Hachirou Inoue Method of boring stake hole of expanded bottom* and bit with expanded end

Also Published As

Publication number Publication date
JPS56168586U (enrdf_load_stackoverflow) 1981-12-12

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