DYNAMIC LOAD ABSORBER IN PARTICULAR FOR MINE ROOF SUPPORTS,申请号PL19890281716-传众专利搜索

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发明名称	DYNAMIC LOAD ABSORBER IN PARTICULAR FOR MINE ROOF SUPPORTS
摘要
申请公布号	PL160707(B1)	申请公布日期	1993.04.30
申请号	PL19890281716	申请日期	1989.10.03
申请人		发明人
分类号	E21D15/44;E21D15/52;(IPC1-7):E21D15/44	主分类号	E21D15/44
代理机构		代理人
主权项
地址

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