在扩眼体设一斜水眼，在导眼体与扩眼体之间连接一缩径增效排屑环，强化了冷却清洗作用，从而保证钻头有较好的使用效果。
Set up a slant water hole at reamer, and connect the reamer and pilot with reducing synergy flute, which strengthen the cooling and washing function and ensure the bit's effects.
在地层内只有连通的空隙才能起导水通道的作用。
Only connected interstices can act as elementary conduits within the formation.
研究发现水对塑料导爆管有渗透作用并对其传爆可靠性有重大影响。
It is discovered that water permeation has vital influence on the detonation propagation reliability of nonel tube.
这些潜在的导水通道在采矿活动及动水压力等因素作用下，成为诱发海水溃入的主要途径。
Under the mining activities, the flowing water pressure and other factors, those potential water flowing channels would be the main accesses to cause the sea water rushing into the mine.
这些潜在的导水通道在采矿活动及动水压力等因素作用下，成为诱发海水溃入的主要途径。
Under the mining activities, the flowing water pressure and other factors, those potential water flowing channels would be the main accesses to cause the sea water rushing into the mine.
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