Process and machine for laying a drain conduit,申请号US19330653554-传众专利搜索

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发明名称	Process and machine for laying a drain conduit
摘要
申请公布号	US1991919(A)	申请公布日期	1935.02.19
申请号	US19330653554	申请日期	1933.01.25
申请人	JAN BRUINS	发明人	BRUINS JAN.
分类号	E02B11/02;E02F5/10	主分类号	E02B11/02
代理机构		代理人
主权项
地址

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