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发明名称
MINE DOOR INSTALLATION
摘要
A power mine door installation utilizing compressed air from the compressed air system available in the mine as the power source for a hydraulic door-operating mechanism.
申请公布号
CA2415531(A1)
申请公布日期
2003.07.04
申请号
CA20032415531
申请日期
2003.01.03
申请人
JACK KENNEDY METAL PRODUCTS & BUILDINGS, INC.
发明人
KENNEDY, WILLIAM R.;KENNEDY, JOHN M.
分类号
E05F15/04;E21F1/12;(IPC1-7):E21F1/10
主分类号
E05F15/04
代理机构
代理人
主权项
地址
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