Apparatus for making concrete piles,申请号US19290401511-传众专利搜索

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发明名称	Apparatus for making concrete piles
摘要
申请公布号	US1779643(A)	申请公布日期	1930.10.28
申请号	US19290401511	申请日期	1929.10.22
申请人	SCHWIERS JR FREDERICK WILLIAM	发明人	JR. FREDERICK WILLIAM SCHWIERS,
分类号	E21B10/32	主分类号	E21B10/32
代理机构		代理人
主权项
地址

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