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发明名称
Method of and apparatus for making conduits by extrusion
摘要
申请公布号
US1780948(A)
申请公布日期
1930.11.11
申请号
US19260127260
申请日期
1926.08.05
申请人
BROWN COMPANY
发明人
SHERMAN JOHN C.
分类号
B28B21/52
主分类号
B28B21/52
代理机构
代理人
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