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发明名称
摘要
申请公布号
JPS52118551(U)
申请公布日期
1977.09.08
申请号
JP19760026493U
申请日期
1976.03.06
申请人
发明人
分类号
E04G21/30;(IPC1-7):E04G21/30
主分类号
E04G21/30
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代理人
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