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发明名称
Mine ventilation structure
摘要
申请公布号
GB2256214(B)
申请公布日期
1994.12.14
申请号
GB19920010959
申请日期
1992.05.22
申请人
* JACK KENNEDY METAL PRODUCTS AND BUILDINGS INC
发明人
JOHN M * KENNEDY;WILLIAM R * KENNEDY
分类号
E21F1/14;(IPC1-7):E21F1/14
主分类号
E21F1/14
代理机构
代理人
主权项
地址
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