Improvements in and connected with chocks and props for use in mines and the like,申请号GB19310011196-传众专利搜索

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发明名称	Improvements in and connected with chocks and props for use in mines and the like
摘要
申请公布号	GB356284(A)	申请公布日期	1931.09.07
申请号	GB19310011196	申请日期	1930.06.06
申请人	STANLEY WALTON-BROWN	发明人
分类号	E21D15/58;E21D15/60	主分类号	E21D15/58
代理机构		代理人
主权项
地址

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