Tunnel lining and method of forming the same,申请号US19450615746-传众专利搜索

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发明名称	Tunnel lining and method of forming the same
摘要
申请公布号	US2429045(A)	申请公布日期	1947.10.14
申请号	US19450615746	申请日期	1945.09.12
申请人	BELLOWS KENNETH C	发明人	BELLOWS KENNETH C.
分类号	E21D11/10	主分类号	E21D11/10
代理机构		代理人
主权项
地址

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