JPS63145988U - - Google Patents

Info

Publication number
JPS63145988U
JPS63145988U JP2041688U JP2041688U JPS63145988U JP S63145988 U JPS63145988 U JP S63145988U JP 2041688 U JP2041688 U JP 2041688U JP 2041688 U JP2041688 U JP 2041688U JP S63145988 U JPS63145988 U JP S63145988U
Authority
JP
Japan
Prior art keywords
pipe
spindle
drill
double
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.)
Granted
Application number
JP2041688U
Other languages
English (en)
Japanese (ja)
Other versions
JPS64468Y2 (enrdf_load_stackoverflow
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 JP2041688U priority Critical patent/JPS64468Y2/ja
Publication of JPS63145988U publication Critical patent/JPS63145988U/ja
Application granted granted Critical
Publication of JPS64468Y2 publication Critical patent/JPS64468Y2/ja
Expired legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP2041688U 1988-02-18 1988-02-18 Expired JPS64468Y2 (enrdf_load_stackoverflow)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2041688U JPS64468Y2 (enrdf_load_stackoverflow) 1988-02-18 1988-02-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2041688U JPS64468Y2 (enrdf_load_stackoverflow) 1988-02-18 1988-02-18

Publications (2)

Publication Number Publication Date
JPS63145988U true JPS63145988U (enrdf_load_stackoverflow) 1988-09-27
JPS64468Y2 JPS64468Y2 (enrdf_load_stackoverflow) 1989-01-06

Family

ID=30815908

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2041688U Expired JPS64468Y2 (enrdf_load_stackoverflow) 1988-02-18 1988-02-18

Country Status (1)

Country Link
JP (1) JPS64468Y2 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03103593A (ja) * 1989-09-14 1991-04-30 Matsuzawa Kiko:Kk 掘削装置及び掘削工法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03103593A (ja) * 1989-09-14 1991-04-30 Matsuzawa Kiko:Kk 掘削装置及び掘削工法

Also Published As

Publication number Publication date
JPS64468Y2 (enrdf_load_stackoverflow) 1989-01-06

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