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发明名称
Improvements relating to bridge structures for use in mine workings
摘要
申请公布号
GB976746(A)
申请公布日期
1964.12.02
申请号
GB19600019432
申请日期
1960.06.01
申请人
SAFETY IN MINES DEVELOPMENTS LIMITED;WALTER JACKSON
发明人
JACKSON ERIC WALTER;JACKSON WALTER
分类号
E21F5/14
主分类号
E21F5/14
代理机构
代理人
主权项
地址
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