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发明名称
Locking device for crane hooks
摘要
申请公布号
US2071499(A)
申请公布日期
1937.02.23
申请号
US19360073927
申请日期
1936.04.11
申请人
KARL CLODFELTER
发明人
CLODFELTER KARL
分类号
H01F7/20
主分类号
H01F7/20
代理机构
代理人
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