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发明名称
Elevator safety device
摘要
申请公布号
US2757757(A)
申请公布日期
1956.08.07
申请号
US19510256176
申请日期
1951.11.14
申请人
WOODWARD IRON COMPANY
发明人
SMITH HEWITT
分类号
B61B9/00
主分类号
B61B9/00
代理机构
代理人
主权项
地址
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