JPH0478798B2 - - Google Patents

Info

Publication number
JPH0478798B2
JPH0478798B2 JP60074982A JP7498285A JPH0478798B2 JP H0478798 B2 JPH0478798 B2 JP H0478798B2 JP 60074982 A JP60074982 A JP 60074982A JP 7498285 A JP7498285 A JP 7498285A JP H0478798 B2 JPH0478798 B2 JP H0478798B2
Authority
JP
Japan
Prior art keywords
reamer
casing
cover
drilling machine
underground
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
JP60074982A
Other languages
English (en)
Japanese (ja)
Other versions
JPS61233193A (ja
Inventor
Tadao Ootsuka
Hiromoto Horie
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.)
Kyokuto Kaihatsu Kogyo Co Ltd
Original Assignee
Kyokuto Kaihatsu Kogyo Co Ltd
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 Kyokuto Kaihatsu Kogyo Co Ltd filed Critical Kyokuto Kaihatsu Kogyo Co Ltd
Priority to JP7498285A priority Critical patent/JPS61233193A/ja
Publication of JPS61233193A publication Critical patent/JPS61233193A/ja
Publication of JPH0478798B2 publication Critical patent/JPH0478798B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP7498285A 1985-04-08 1985-04-08 地中貫孔機用孔拡張装置 Granted JPS61233193A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7498285A JPS61233193A (ja) 1985-04-08 1985-04-08 地中貫孔機用孔拡張装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7498285A JPS61233193A (ja) 1985-04-08 1985-04-08 地中貫孔機用孔拡張装置

Publications (2)

Publication Number Publication Date
JPS61233193A JPS61233193A (ja) 1986-10-17
JPH0478798B2 true JPH0478798B2 (cs) 1992-12-14

Family

ID=13562996

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7498285A Granted JPS61233193A (ja) 1985-04-08 1985-04-08 地中貫孔機用孔拡張装置

Country Status (1)

Country Link
JP (1) JPS61233193A (cs)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5425721A (en) * 1977-07-28 1979-02-26 Seiko Epson Corp Electronic portable musical instrument
JPS5531111U (cs) * 1978-08-14 1980-02-28
JPS5928718A (ja) * 1982-08-10 1984-02-15 Fuji Electric Corp Res & Dev Ltd 遅延回路

Also Published As

Publication number Publication date
JPS61233193A (ja) 1986-10-17

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