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发明名称
Shell making
摘要
申请公布号
US2292928(A)
申请公布日期
1942.08.11
申请号
US19400340754
申请日期
1940.06.15
申请人
发明人
CORYELL WILLIAM C.
分类号
B21K1/00
主分类号
B21K1/00
代理机构
代理人
主权项
地址
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