JPH0519434Y2 - - Google Patents

Info

Publication number
JPH0519434Y2
JPH0519434Y2 JP11312988U JP11312988U JPH0519434Y2 JP H0519434 Y2 JPH0519434 Y2 JP H0519434Y2 JP 11312988 U JP11312988 U JP 11312988U JP 11312988 U JP11312988 U JP 11312988U JP H0519434 Y2 JPH0519434 Y2 JP H0519434Y2
Authority
JP
Japan
Prior art keywords
receiving recess
bit body
upright
holder block
bit
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
JP11312988U
Other languages
English (en)
Japanese (ja)
Other versions
JPH0233891U (no
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 filed Critical
Priority to JP11312988U priority Critical patent/JPH0519434Y2/ja
Publication of JPH0233891U publication Critical patent/JPH0233891U/ja
Application granted granted Critical
Publication of JPH0519434Y2 publication Critical patent/JPH0519434Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP11312988U 1988-08-29 1988-08-29 Expired - Lifetime JPH0519434Y2 (no)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11312988U JPH0519434Y2 (no) 1988-08-29 1988-08-29

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11312988U JPH0519434Y2 (no) 1988-08-29 1988-08-29

Publications (2)

Publication Number Publication Date
JPH0233891U JPH0233891U (no) 1990-03-02
JPH0519434Y2 true JPH0519434Y2 (no) 1993-05-21

Family

ID=31352695

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11312988U Expired - Lifetime JPH0519434Y2 (no) 1988-08-29 1988-08-29

Country Status (1)

Country Link
JP (1) JPH0519434Y2 (no)

Also Published As

Publication number Publication date
JPH0233891U (no) 1990-03-02

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