INTERSECTION STRUCTURE OF A CROSS HEADING WITH A WALL FACE,申请号PL19780205534-传众专利搜索

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发明名称	INTERSECTION STRUCTURE OF A CROSS HEADING WITH A WALL FACE
摘要
申请公布号	PL114175(B1)	申请公布日期	1981.01.31
申请号	PL19780205534	申请日期	1978.03.22
申请人		发明人
分类号	E21C41/00;E21D;(IPC1-7):E21C41/00	主分类号	E21C41/00
代理机构		代理人
主权项
地址

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