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发明名称
Perfectionnements aux pistons en métal léger
摘要
申请公布号
FR701939(A)
申请公布日期
1931.03.25
申请号
FRD701939
申请日期
1930.09.13
申请人
发明人
KRAMER LUDWIG
分类号
F02F3/00;F02F3/02
主分类号
F02F3/00
代理机构
代理人
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