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。
Triple interlock of mechanic, electric and hydraulic devices.
机械、电器、液压三重连锁安全保护功能。
Inspect the electric motor protection, control and interlock if they are right.
接触电动机的保护装置，控制系统，联锁系统是否符合要求。
Inspect the electric motor protection, control and interlock if they are right.
接触电动机的保护装置，控制系统，联锁系统是否符合要求。
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