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发明名称
摘要
申请公布号
FR1590775(A)
申请公布日期
1970.04.20
申请号
FRD1590775
申请日期
1968.11.05
申请人
发明人
分类号
B65G19/18;E21C25/56;E21C35/12
主分类号
B65G19/18
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