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发明名称
Improvements in or relating to double thread screw cutting machines
摘要
申请公布号
GB353470(A)
申请公布日期
1931.07.22
申请号
GB19300012476
申请日期
1930.04.22
申请人
JOHN ALBERT ARENZ
发明人
分类号
B23G1/06
主分类号
B23G1/06
代理机构
代理人
主权项
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