Improvements in or relating to pit supports,申请号GB19490020018-传众专利搜索

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发明名称	Improvements in or relating to pit supports
摘要
申请公布号	GB660738(A)	申请公布日期	1951.11.14
申请号	GB19490020018	申请日期	1949.07.29
申请人	HANS GERLACH	发明人
分类号	E21D15/22;E21D15/43;E21D17/086	主分类号	E21D15/22
代理机构		代理人
主权项
地址

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