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发明名称
ROTARY EXCAVATION
摘要
申请公布号
JPS573994(A)
申请公布日期
1982.01.09
申请号
JP19800075713
申请日期
1980.06.04
申请人
OSAKA BOSUI KENSETSUSHA KK
发明人
UGA TERUO;MATSUMURA KIYOSHI
分类号
E21B3/00;E21B21/00
主分类号
E21B3/00
代理机构
代理人
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地址
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