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发明名称
Mechanically operated counterbalance
摘要
申请公布号
US2071009(A)
申请公布日期
1937.02.16
申请号
US19290367244
申请日期
1929.05.31
申请人
CHARLES TROUT WALTER
发明人
TROUT WALTER CHARLES
分类号
F04B47/14
主分类号
F04B47/14
代理机构
代理人
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