Improvements in apparatus for enabling pit props or the like to be transported by gravity from an elevated to a lower level,申请号GB19590004145-传众专利搜索

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发明名称	Improvements in apparatus for enabling pit props or the like to be transported by gravity from an elevated to a lower level
摘要
申请公布号	GB856702(A)	申请公布日期	1960.12.21
申请号	GB19590004145	申请日期	1959.02.05
申请人	MANFRED WALTHER;JOHANNES PRETZSCH	发明人
分类号	E21F13/00	主分类号	E21F13/00
代理机构		代理人
主权项
地址

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