JPH0257306U - - Google Patents

Info

Publication number
JPH0257306U
JPH0257306U JP13806488U JP13806488U JPH0257306U JP H0257306 U JPH0257306 U JP H0257306U JP 13806488 U JP13806488 U JP 13806488U JP 13806488 U JP13806488 U JP 13806488U JP H0257306 U JPH0257306 U JP H0257306U
Authority
JP
Japan
Prior art keywords
vertical direction
helical
drive part
spiral
excavation
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
JP13806488U
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 JP13806488U priority Critical patent/JPH0257306U/ja
Publication of JPH0257306U publication Critical patent/JPH0257306U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP13806488U 1988-10-21 1988-10-21 Pending JPH0257306U (US06272168-20010807-M00014.png)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13806488U JPH0257306U (US06272168-20010807-M00014.png) 1988-10-21 1988-10-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13806488U JPH0257306U (US06272168-20010807-M00014.png) 1988-10-21 1988-10-21

Publications (1)

Publication Number Publication Date
JPH0257306U true JPH0257306U (US06272168-20010807-M00014.png) 1990-04-25

Family

ID=31400057

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13806488U Pending JPH0257306U (US06272168-20010807-M00014.png) 1988-10-21 1988-10-21

Country Status (1)

Country Link
JP (1) JPH0257306U (US06272168-20010807-M00014.png)

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