JPH0412154Y2 - - Google Patents

Info

Publication number
JPH0412154Y2
JPH0412154Y2 JP12659487U JP12659487U JPH0412154Y2 JP H0412154 Y2 JPH0412154 Y2 JP H0412154Y2 JP 12659487 U JP12659487 U JP 12659487U JP 12659487 U JP12659487 U JP 12659487U JP H0412154 Y2 JPH0412154 Y2 JP H0412154Y2
Authority
JP
Japan
Prior art keywords
screw
sand plug
protrusion
sand
casing
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
Application number
JP12659487U
Other languages
English (en)
Japanese (ja)
Other versions
JPS6431195U (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 JP12659487U priority Critical patent/JPH0412154Y2/ja
Publication of JPS6431195U publication Critical patent/JPS6431195U/ja
Application granted granted Critical
Publication of JPH0412154Y2 publication Critical patent/JPH0412154Y2/ja
Expired legal-status Critical Current

Links

Landscapes

  • Excavating Of Shafts Or Tunnels (AREA)
JP12659487U 1987-08-19 1987-08-19 Expired JPH0412154Y2 (en])

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12659487U JPH0412154Y2 (en]) 1987-08-19 1987-08-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12659487U JPH0412154Y2 (en]) 1987-08-19 1987-08-19

Publications (2)

Publication Number Publication Date
JPS6431195U JPS6431195U (en]) 1989-02-27
JPH0412154Y2 true JPH0412154Y2 (en]) 1992-03-25

Family

ID=31378256

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12659487U Expired JPH0412154Y2 (en]) 1987-08-19 1987-08-19

Country Status (1)

Country Link
JP (1) JPH0412154Y2 (en])

Also Published As

Publication number Publication date
JPS6431195U (en]) 1989-02-27

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