电机每月均应有专业人士检修，确认无安全隐患后方可使用。
Please overhaul the motor by professional & technical people to ensure there is no potential safety hazard rear to use.
基于以太网的无源光网络(EPON)是一个点到多点的系统，面临着很多安全隐患。
An Ethernet passive optical network (EPON) is a point-to-multipoint network and there are threats to EPON security.
从根本上杜绝了掘进机操作时无警铃提示而突然动作造成的不安全隐患，填补了国内外掘进机无安全预警系统的空白。
Overcoming the hidden danger when the heading machine is working but suddenly moving. Replenising the empty place that the heading machine no safety warning system .
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