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。

youdao

Underhole drilling technology solved the difficulties of drilling in wet layers, deepened the drilling under water, and found an effective method of drilling hi pouring crushing layer.

潜孔锤泡沫钻进技术彻底攻克了潜孔锤在潮湿地层钻进的难关，加深了潜孔锤水下钻进的深度，找到了一条在涌水破碎地层进行潜孔锤钻进的有效途径。

youdao

Until the introduction of wet drilling, the death rate from silicosis in the Upper Weardale fluorspar miners was high.

BBC: Kidney disease 'risk from silica'