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发明名称
Improvements relating to automatic control of air locks in mines
摘要
申请公布号
GB756887(A)
申请公布日期
1956.09.12
申请号
GB19540004547
申请日期
1954.02.16
申请人
THE BRITISH THOMSON-HOUSTON COMPANY LIMITED
发明人
ENTWISTLE HERBERT;CREETH DENNIS
分类号
E21F1/14
主分类号
E21F1/14
代理机构
代理人
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