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发明名称
摘要
申请公布号
JPS4894523(U)
申请公布日期
1973.11.12
申请号
JP19720018643U
申请日期
1972.02.14
申请人
发明人
分类号
E04C5/18;E04G17/06;E04G17/065;E04G21/12;(IPC1-7):E04G17/08
主分类号
E04C5/18
代理机构
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