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发明名称
Device for plotting flat blanks to form tubular transition pieces
摘要
申请公布号
US2692434(A)
申请公布日期
1954.10.26
申请号
US19490126963
申请日期
1949.11.14
申请人
WAYNE R. MILLINGTON
发明人
LEFFLER CHARLES R.
分类号
B25H7/00;B25H7/02
主分类号
B25H7/00
代理机构
代理人
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地址
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