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发明名称
摘要
申请公布号
PL87957(B1)
申请公布日期
1976.07.31
申请号
PL19740169147
申请日期
1974.02.28
申请人
发明人
分类号
A62B1/16;E04D13/12;E04G21/32;(IPC1-7):E04G21/32
主分类号
A62B1/16
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