JPH0551755B2 - - Google Patents

Info

Publication number
JPH0551755B2
JPH0551755B2 JP62052696A JP5269687A JPH0551755B2 JP H0551755 B2 JPH0551755 B2 JP H0551755B2 JP 62052696 A JP62052696 A JP 62052696A JP 5269687 A JP5269687 A JP 5269687A JP H0551755 B2 JPH0551755 B2 JP H0551755B2
Authority
JP
Japan
Prior art keywords
excavation
shaft
bit
holes
shafts
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
Application number
JP62052696A
Other languages
English (en)
Japanese (ja)
Other versions
JPS63219792A (ja
Inventor
Norio Kagota
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.)
NIPPON EA DORIRU SHISUTEMU KK
Original Assignee
NIPPON EA DORIRU SHISUTEMU KK
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 NIPPON EA DORIRU SHISUTEMU KK filed Critical NIPPON EA DORIRU SHISUTEMU KK
Priority to JP5269687A priority Critical patent/JPS63219792A/ja
Publication of JPS63219792A publication Critical patent/JPS63219792A/ja
Publication of JPH0551755B2 publication Critical patent/JPH0551755B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
JP5269687A 1987-03-06 1987-03-06 掘削装置 Granted JPS63219792A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5269687A JPS63219792A (ja) 1987-03-06 1987-03-06 掘削装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5269687A JPS63219792A (ja) 1987-03-06 1987-03-06 掘削装置

Publications (2)

Publication Number Publication Date
JPS63219792A JPS63219792A (ja) 1988-09-13
JPH0551755B2 true JPH0551755B2 (enrdf_load_stackoverflow) 1993-08-03

Family

ID=12922049

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5269687A Granted JPS63219792A (ja) 1987-03-06 1987-03-06 掘削装置

Country Status (1)

Country Link
JP (1) JPS63219792A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2599846B2 (ja) * 1990-07-27 1997-04-16 三菱マテリアル株式会社 掘削工具

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5187401A (ja) * 1975-01-29 1976-07-31 Giin Aburahamu Kuatsusadoshogekisayosochi
JPS5520877Y2 (enrdf_load_stackoverflow) * 1976-03-03 1980-05-19
JPS5520878Y2 (enrdf_load_stackoverflow) * 1978-09-04 1980-05-19
JPS5973391A (ja) * 1982-10-20 1984-04-25 Mitsui Eng & Shipbuild Co Ltd 船舶における整流装置
JPS5976391A (ja) * 1982-10-25 1984-05-01 株式会社利根ボ−リング 空圧打撃式拡孔掘削装置

Also Published As

Publication number Publication date
JPS63219792A (ja) 1988-09-13

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