Swing-type check off er the least pressure drop and offer simple automatic closure; when fluid flow stops gravity and flow reversal closes valve.
旋启式止回阀压降最小，能够完全自动关闭，即在介质流动停止、重力和介质倒流的状态下自动关闭阀门。
The coning of bottom water will happen as soon as the producing pressure drop of a well is higher than the difference of gravity caused by the difference of density between oil and water.
当油井生产形成压力降落大于油水密度差引起的重力差时，砂岩底水油藏锥进即会发生。
In this range, the pressure drop increases in proportion to the specific gravity of the mixture.
在这个范围内压力差的增加与混合物的比重成比例。
The pressure drop is one of the most important characteristics in hydrodynamics of high-gravity rotating bed.
压降是超重力旋转床流体力学的重要特征之一。
Coagulation of viscosity nano-liquid drop aerosol in the gravity field is investigated.
研究重力场中粘性纳米气溶胶液滴之间的碰并问题。
The gravity values drop before the events and it continues temporarily after earthquake, then retrieve upward progressively.
震前重力场呈下降变化，震后短时间内仍维持下降，尔后，重力场逐渐回升。
Internal corrosion control technology in pipeline includes gravity drop method to measure corrosion speed and pour into anti-corrosion doze.
输气管道内腐蚀控制技术包括采用失重挂片法测量管道内腐蚀速度和加注缓蚀剂等。
Relaxation (involving the whole body), arm weight (gravity drop), and avoidance of mindless repetitive exercises were key elements in Chopin's teachings.
放松(全身)，手臂重量(自由下落)，避免无意识的重复训练都是肖邦教学中的关键元素。
Relax your arm (the whole body, actually), keep your wrist flexible, lift the hand from 5 to 20 cm above the keys (the shorter distance in the beginning), and let gravity drop your hand.
手臂放松(事实上是整个身体都要放松)，保持手腕柔软，然后将手抬高离开键盘5至20公分(开始时用较短的距离)，让手自然放下。
Relax your arm (the whole body, actually), keep your wrist flexible, lift the hand from 5 to 20 cm above the keys (the shorter distance in the beginning), and let gravity drop your hand.
手臂放松(事实上是整个身体都要放松)，保持手腕柔软，然后将手抬高离开键盘5至20公分(开始时用较短的距离)，让手自然放下。
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