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发明名称
Verfahren zur Herstellung von hohlen Metallstangen u. dgl., z.B. Hohlstahl fuer Gesteinsbohrer
摘要
申请公布号
DE620127(C)
申请公布日期
1935.10.14
申请号
DE1934A072833D
申请日期
1934.03.25
申请人
AKTIEBOLAGET BOFORS
发明人
分类号
B22D19/16
主分类号
B22D19/16
代理机构
代理人
主权项
地址
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