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发明名称
Perfectionnements apportés aux ressorts en forme de disque et à déformation brusque
摘要
申请公布号
FR928990(A)
申请公布日期
1947.12.12
申请号
FRD928990
申请日期
1946.06.13
申请人
JOHN B. PIERCE FOUNDATION
发明人
分类号
F16F1/32
主分类号
F16F1/32
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代理人
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