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发明名称
Procédé pour le traitement préalable de pièces à usiner en acier ou en fer
摘要
申请公布号
FR800720(A)
申请公布日期
1936.07.17
申请号
FRD800720
申请日期
1936.01.15
申请人
发明人
SINGER FRITZ
分类号
B21C37/00
主分类号
B21C37/00
代理机构
代理人
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地址
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