美白护肤，用空压技术(Air grind technology)细密粉碎的维生素C粒子和熊果苷成分，有用压抑黑色素生成，解决只用日间的基础护肤不能完全做到的美白护理。
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提出了一种减小钻井泥浆环空循环压耗的井下工具，介绍了该工具的结构、工作原理、技术参数。
Therefore, a downhole tool that can reduce the annular cyclic pressure loss and introduced its structure, principle of work and technical parameters were put forward.
井底负压值控制是欠平衡钻井技术的基础，而井底负压值的大小与环空多相流的有关压力计算有关。
The under-balanced drilling technology is based on how to control the bottom negative pressure which is related to the pressure computation of multiphase flow in annulus .
环空水力模拟是控压钻井技术的一个重要组成部分。
Annular hydraulic simulation is a key part of any Managed Pressure Drilling (MPD) operation.
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