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Document Type and Number:
Japanese Patent JPH01176200
Kind Code:
U
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Application Number:
JP7339288U
Publication Date:
December 15, 1989
Filing Date:
June 03, 1988
Export Citation:
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International Classes:
E21D11/40; (IPC1-7): E21D11/40
Domestic Patent References:
JPS5925079A1984-02-08
JPS4813731A
JPS60261898A1985-12-25
JPS55161621U1980-11-20



 
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