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发明名称
摘要
申请公布号
JPS6250295(U)
申请公布日期
1987.03.28
申请号
JP19850139802U
申请日期
1985.09.11
申请人
发明人
分类号
E21D9/13;E21D9/06;(IPC1-7):E21D9/06
主分类号
E21D9/13
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