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经营范围
发明名称
Apparatus for opening a hollow flattened cylindrical body
摘要
申请公布号
US2812002(A)
申请公布日期
1957.11.05
申请号
US19520293244
申请日期
1952.06.13
申请人
GROTNES MACHINE WORKS, INC.
发明人
GROTNES CARL C.
分类号
B21D51/26
主分类号
B21D51/26
代理机构
代理人
主权项
地址
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