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发明名称
摘要
申请公布号
JPH0310239(Y2)
申请公布日期
1991.03.13
申请号
JP19850097626U
申请日期
1985.06.28
申请人
发明人
分类号
E21D11/40;(IPC1-7):E21D11/40
主分类号
E21D11/40
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