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发明名称
Method and apparatus for pressure butt-welding tubes and the like
摘要
申请公布号
US1888815(A)
申请公布日期
1932.11.22
申请号
US19300504254
申请日期
1930.12.23
申请人
BEGTRUP EDWARD F
发明人
BEGTRUP EDWARD F.
分类号
B23K23/00
主分类号
B23K23/00
代理机构
代理人
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