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发明名称
Improvements in collapsible screw threading taps for pipe couplings
摘要
申请公布号
GB475986(A)
申请公布日期
1937.11.30
申请号
GB19360029375
申请日期
1936.10.28
申请人
THE NATIONAL ACME COMPANY
发明人
分类号
B23G1/22
主分类号
B23G1/22
代理机构
代理人
主权项
地址
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