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发明名称
摘要
申请公布号
PL93419(B1)
申请公布日期
1977.05.30
申请号
PL19740172978
申请日期
1974.07.24
申请人
发明人
分类号
B63C1/08;E02B7/20;(IPC1-7):B63C1/08
主分类号
B63C1/08
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