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发明名称
Brake mechanism for well machinery
摘要
申请公布号
US2052937(A)
申请公布日期
1936.09.01
申请号
US19360060498
申请日期
1936.01.23
申请人
JUDSON NEFF ASA
发明人
NEFF ASA JUDSON
分类号
F16D49/10
主分类号
F16D49/10
代理机构
代理人
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地址
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