JPH0350880B2 - - Google Patents

Info

Publication number
JPH0350880B2
JPH0350880B2 JP60082006A JP8200685A JPH0350880B2 JP H0350880 B2 JPH0350880 B2 JP H0350880B2 JP 60082006 A JP60082006 A JP 60082006A JP 8200685 A JP8200685 A JP 8200685A JP H0350880 B2 JPH0350880 B2 JP H0350880B2
Authority
JP
Japan
Prior art keywords
cutting
tip
tube
hidden
pilot
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
JP60082006A
Other languages
English (en)
Japanese (ja)
Other versions
JPS61242300A (ja
Inventor
Motoyuki Takasu
Koichi Hara
Masanori Hanada
Hisao Takeuchi
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.)
Tokyu Construction Co Ltd
Original Assignee
Tokyu Construction 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 Tokyu Construction Co Ltd filed Critical Tokyu Construction Co Ltd
Priority to JP8200685A priority Critical patent/JPS61242300A/ja
Publication of JPS61242300A publication Critical patent/JPS61242300A/ja
Publication of JPH0350880B2 publication Critical patent/JPH0350880B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Excavating Of Shafts Or Tunnels (AREA)
  • Earth Drilling (AREA)
JP8200685A 1985-04-17 1985-04-17 かくれチツプを備えた切削用円筒管 Granted JPS61242300A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8200685A JPS61242300A (ja) 1985-04-17 1985-04-17 かくれチツプを備えた切削用円筒管

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8200685A JPS61242300A (ja) 1985-04-17 1985-04-17 かくれチツプを備えた切削用円筒管

Publications (2)

Publication Number Publication Date
JPS61242300A JPS61242300A (ja) 1986-10-28
JPH0350880B2 true JPH0350880B2 (enExample) 1991-08-05

Family

ID=13762437

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8200685A Granted JPS61242300A (ja) 1985-04-17 1985-04-17 かくれチツプを備えた切削用円筒管

Country Status (1)

Country Link
JP (1) JPS61242300A (enExample)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6019199Y2 (ja) * 1979-11-15 1985-06-10 石川島播磨重工業株式会社 シ−ルド掘進機用ビツト
JPS6023591A (ja) * 1983-07-19 1985-02-06 株式会社利根ボ−リング コアボ−リング用ドリルビツト

Also Published As

Publication number Publication date
JPS61242300A (ja) 1986-10-28

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