一个技术难题是气穴现象，一旦发生气穴现象，位于旋转螺旋桨叶后方的低压会产生气泡。
One technical difficulty is cavitation, where low pressure behind a turning blade causes air bubbles.
基于实钻研究，分析空气泡沫钻进技术在地质岩心钻探中应用的技术优势和社会经济意义；
The article analyses the technique superiority and social economic meanings of the air-foam drilling on the basis of the studying to productive experiment.
容易申请，没有气泡-空气释放技术使消费者可以运用他们的皮肤、无气泡。
Easy to apply, no air bubbles - the air release technology allows consumers to apply their skin without air bubbles.
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