Tunnel liner segment,申请号US19350041435-传众专利搜索

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发明名称	Tunnel liner segment
摘要
申请公布号	US2131794(A)	申请公布日期	1938.10.04
申请号	US19350041435	申请日期	1935.09.20
申请人	THE COMMERICAL SHEARING & STAMPING COMPANY	发明人	CUSHWA CHARLES B.
分类号	E21D11/15	主分类号	E21D11/15
代理机构		代理人
主权项
地址

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