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发明名称
Crown block brake assembly
摘要
申请公布号
US2646251(A)
申请公布日期
1953.07.21
申请号
US19520272091
申请日期
1952.02.18
申请人
MCINNIS ROBERSON CLAUDE
发明人
ROBERSON CLAUDE MCINNIS
分类号
B66D3/06;E21B19/02
主分类号
B66D3/06
代理机构
代理人
主权项
地址
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