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发明名称
摘要
申请公布号
JPH0349355(B2)
申请公布日期
1991.07.29
申请号
JP19840180679
申请日期
1984.08.31
申请人
SEIKEN CO
发明人
TOBE NOBORU;KATO TETSUJI
分类号
E21D11/00
主分类号
E21D11/00
代理机构
代理人
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