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发明名称
摘要
申请公布号
JPH02120588(U)
申请公布日期
1990.09.28
申请号
JP19890026669U
申请日期
1989.03.10
申请人
发明人
分类号
E21D5/10;(IPC1-7):E21D5/10
主分类号
E21D5/10
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