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发明名称
Boom
摘要
申请公布号
US2377758(A)
申请公布日期
1945.06.05
申请号
US19430512449
申请日期
1943.12.01
申请人
发明人
COHEN HAROLD
分类号
B66C23/20;B66C23/28;E04H12/34
主分类号
B66C23/20
代理机构
代理人
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