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发明名称
Variable throw eccentric mechanism
摘要
申请公布号
US2536213(A)
申请公布日期
1951.01.02
申请号
US19490083923
申请日期
1949.03.28
申请人
ROLAND PLOTTS
发明人
PLOTTS ROLAND
分类号
E21B43/12;F16H21/42
主分类号
E21B43/12
代理机构
代理人
主权项
地址
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