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发明名称
摘要
申请公布号
FR1552865(A)
申请公布日期
1969.01.10
申请号
FRD1552865
申请日期
1967.08.03
申请人
发明人
分类号
E04H6/06;E04H9/12
主分类号
E04H6/06
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