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摘要
申请公布号
NL134472(B)
申请公布日期
1955.07.15
申请号
NL19470134472
申请日期
1947.08.28
申请人
发明人
分类号
B22C9/04;B22D13/04;B22D13/10;B22D19/00
主分类号
B22C9/04
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