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发明名称
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摘要
申请公布号
CA683247(A)
申请公布日期
1964.03.31
申请号
CAD683247
申请日期
申请人
WALKER MANUFACTURING COMPANY
发明人
ROBERT K. HATHAWAY;WILLIAM G. MCKENZIE;EDWARD C. SEILS, JR.
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主分类号
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