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发明名称
Improvements relating to metallic stilts for mine arch girders
摘要
申请公布号
GB406221(A)
申请公布日期
1934.02.22
申请号
GB19330024388
申请日期
1933.09.02
申请人
THE WEMYSS COAL COMPANY, LIMITED;DUGALD BAIRD
发明人
分类号
E21D15/22;E21D15/42
主分类号
E21D15/22
代理机构
代理人
主权项
地址
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