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发明名称
HYDRODYNAMIC BRAKE MECHANISM
摘要
申请公布号
CA375515(A)
申请公布日期
1938.08.02
申请号
CAD375515
申请日期
申请人
THE PARKERSBURG RIG AND REEL COMPANY
发明人
ROBERT GRIFFIN DE LA MATER
分类号
主分类号
代理机构
代理人
主权项
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