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发明名称
Device for varying the frequency of a vibration exciter
摘要
申请公布号
US3004389(A)
申请公布日期
1961.10.17
申请号
US19600022230
申请日期
1960.04.14
申请人
LUDWIG MULLER
发明人
MULLER LUDWIG
分类号
E02D7/18
主分类号
E02D7/18
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代理人
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