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发明名称
Automatic portable derrick
摘要
申请公布号
US2258383(A)
申请公布日期
1941.10.07
申请号
US19380248353
申请日期
1938.12.29
申请人
GEORGE HANIQUET
发明人
HANIQUET GEORGE
分类号
B66C23/36;B66C23/90
主分类号
B66C23/36
代理机构
代理人
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地址
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