The digital input can be used in conjunction with an external safety interlock switch.

数字输入可以和外部安全联锁开关联结在一起。

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Every machine is equipped with protect travel switch in order to increase safety coefficient for repairing and maintenance. It also has thermal overload relays to protect the motor.

每台机器均配有保护行程开关，为维修、保养增加一份安全系数。且装有热过载继电器，保护电机。

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In recent years, with national high attention to coal mine safety and the non-oil development of home high-pressure switch cabinet, mine use high-pressure vacuum switch cabinet has a good market.

近年来，随着国家对煤矿安全的高度重视，国内高压开关柜向无油化发展，矿用高压真空开关柜具有良好的市场。

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The move is to repair a problem with a switch that could increase the risk of a crash, the National Highway Traffic Safety Administration (NHTSA) said.

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Mid and West Wales Fire Service was also criticised over plans to switch 21 full-time firefighters in Powys to community safety work, replacing them on emergency duties with volunteer crews.

BBC: Llanelli fire station: Authority to discuss shift row