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发明名称
摘要
申请公布号
JPH02147520(U)
申请公布日期
1990.12.14
申请号
JP19890056440U
申请日期
1989.05.18
申请人
发明人
分类号
E04D3/40;E04D13/15;(IPC1-7):E04D3/40
主分类号
E04D3/40
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