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发明名称
Process of drawing bell and spigottype pipe
摘要
申请公布号
US1979571(A)
申请公布日期
1934.11.06
申请号
US19320627580
申请日期
1932.08.05
申请人
C. P. BYRNES
发明人
PEDERSEN INGVALD O.
分类号
C03B15/14
主分类号
C03B15/14
代理机构
代理人
主权项
地址
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