For this reason, the well designer generally seeks to maximize the fluid velocity (or other measure of jet energy) to achieve maximum cleaning at the bottom of the hole.

正因为这一原因，井眼设计人员一般寻求使流体速度(或其它射流能量)最大化的方法去达到最大程度地清洁井底的目的。

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In order to explore the effect of ambient pressure on jet flow field in deep well and ultra-deep well, a physical model for flow field of confined water jet at bottom hole was established.

考虑到深井、超深井中井底围压对射流流场有一定的影响，建立了井底受限射流流场的物理模型。

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It hums like a bee on the tea-table, and the steam rises in a little jet from a tiny hole in the top. The boiling water comes out of a tap at the bottom.

放在茶几上，它会像蜜蜂一样嗡嗡作响，蒸汽从顶上的一个小孔钻出来往上升，热水可以从下边的一个水龙头放出来。

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