JPS5313885B2 - - Google Patents

Info

Publication number
JPS5313885B2
JPS5313885B2 JP6620775A JP6620775A JPS5313885B2 JP S5313885 B2 JPS5313885 B2 JP S5313885B2 JP 6620775 A JP6620775 A JP 6620775A JP 6620775 A JP6620775 A JP 6620775A JP S5313885 B2 JPS5313885 B2 JP S5313885B2
Authority
JP
Japan
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
Application number
JP6620775A
Other languages
Japanese (ja)
Other versions
JPS51141416A (en
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 JP6620775A priority Critical patent/JPS51141416A/ja
Publication of JPS51141416A publication Critical patent/JPS51141416A/ja
Publication of JPS5313885B2 publication Critical patent/JPS5313885B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Excavating Of Shafts Or Tunnels (AREA)
  • Earth Drilling (AREA)
JP6620775A 1975-06-02 1975-06-02 Straight drilling method and apparatus Granted JPS51141416A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6620775A JPS51141416A (en) 1975-06-02 1975-06-02 Straight drilling method and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6620775A JPS51141416A (en) 1975-06-02 1975-06-02 Straight drilling method and apparatus

Publications (2)

Publication Number Publication Date
JPS51141416A JPS51141416A (en) 1976-12-06
JPS5313885B2 true JPS5313885B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1978-05-13

Family

ID=13309148

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6620775A Granted JPS51141416A (en) 1975-06-02 1975-06-02 Straight drilling method and apparatus

Country Status (1)

Country Link
JP (1) JPS51141416A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Also Published As

Publication number Publication date
JPS51141416A (en) 1976-12-06

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