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发明名称
摘要
申请公布号
JPH0211520(Y2)
申请公布日期
1990.03.23
申请号
JP19830103674U
申请日期
1983.07.04
申请人
发明人
分类号
E21D9/13;E21D9/06;E21D9/08;(IPC1-7):E21D9/08
主分类号
E21D9/13
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