Improvements in hydraulic pit props,申请号GB19530023856-传众专利搜索

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发明名称	Improvements in hydraulic pit props
摘要
申请公布号	GB746779(A)	申请公布日期	1956.03.21
申请号	GB19530023856	申请日期	1953.08.28
申请人	DOWTY HYDRAULIC UNITS LIMITED;LESTER LESLIE SYLVESTER BARNETT;COLIN MICHAEL FRYE	发明人
分类号	E21D15/45	主分类号	E21D15/45
代理机构		代理人
主权项
地址

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