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发明名称
Safety lowering device
摘要
申请公布号
US2502896(A)
申请公布日期
1950.04.04
申请号
US19470746192
申请日期
1947.05.06
申请人
SHERBROOK CLARENCE H;NOLLEY LEONARD F
发明人
SHERBROOK CLARENCE H.;NOLLEY LEONARD F.
分类号
A62B1/12
主分类号
A62B1/12
代理机构
代理人
主权项
地址
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