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经营范围
发明名称
REVERSIBLE RATCHET DEVICE
摘要
申请公布号
CA554530(A)
申请公布日期
1958.03.18
申请号
CAD554530
申请日期
申请人
DEPARTMENT OF NATIONAL DEFENCE
发明人
JOHN B. WITCHELL
分类号
主分类号
代理机构
代理人
主权项
地址
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