JPH0211891U - - Google Patents

Info

Publication number
JPH0211891U
JPH0211891U JP8946888U JP8946888U JPH0211891U JP H0211891 U JPH0211891 U JP H0211891U JP 8946888 U JP8946888 U JP 8946888U JP 8946888 U JP8946888 U JP 8946888U JP H0211891 U JPH0211891 U JP H0211891U
Authority
JP
Japan
Prior art keywords
steel rod
drilling tool
free surface
rock
type drilling
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.)
Pending
Application number
JP8946888U
Other languages
English (en)
Japanese (ja)
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 JP8946888U priority Critical patent/JPH0211891U/ja
Publication of JPH0211891U publication Critical patent/JPH0211891U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Earth Drilling (AREA)
JP8946888U 1988-07-07 1988-07-07 Pending JPH0211891U (enrdf_load_stackoverflow)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8946888U JPH0211891U (enrdf_load_stackoverflow) 1988-07-07 1988-07-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8946888U JPH0211891U (enrdf_load_stackoverflow) 1988-07-07 1988-07-07

Publications (1)

Publication Number Publication Date
JPH0211891U true JPH0211891U (enrdf_load_stackoverflow) 1990-01-25

Family

ID=31314018

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8946888U Pending JPH0211891U (enrdf_load_stackoverflow) 1988-07-07 1988-07-07

Country Status (1)

Country Link
JP (1) JPH0211891U (enrdf_load_stackoverflow)

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