EXTENDABLE ROOF CAP HYDRAULIC CONTROL SYSTEM AND LONGWALL FACE SHIELD FOR A LONGWALL WORKING ROOF SUPPORT,申请号PL19850253283-传众专利搜索

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发明名称	EXTENDABLE ROOF CAP HYDRAULIC CONTROL SYSTEM AND LONGWALL FACE SHIELD FOR A LONGWALL WORKING ROOF SUPPORT
摘要
申请公布号	PL148363(B1)	申请公布日期	1989.10.31
申请号	PL19850253283	申请日期	1985.05.07
申请人		发明人
分类号	E21D;E21D17/05;E21D23/16;(IPC1-7):E21D17/05	主分类号	E21D
代理机构		代理人
主权项
地址

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