External interlock input 外部联锁投入
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。
The causes of using traditional wet drilling difficultly are analysed. And the wet drilling method of the coal electric drill of external spray hydroelectric interlock is related.
分析了传统湿式打眼难以推广应用的原因，叙述了外喷雾水电联锁煤电钻湿式打眼法。
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