It is tightly related to network of information technology in colliery safety.
这与我国煤矿安全信息技术的网络化程度不高密切相关。
The device improves the security of the colliery power distribution system greatly.
该装置可大大提高煤矿供电系统的安全可靠性。
The device improves the security of the colliery power distribution system greatly.
该装置可大大提高煤矿供电系统的安全可靠性。
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