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发明名称
Free-fall drive-hammer assembly
摘要
申请公布号
US3039546(A)
申请公布日期
1962.06.19
申请号
US19580772232
申请日期
1958.11.06
申请人
SPRAGUE & HENWOOD, INCORPORATED
发明人
JANSON LEROY W.;JONES STANFORD B.
分类号
E02D1/02
主分类号
E02D1/02
代理机构
代理人
主权项
地址
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