free-air effect 自由空间效应
In addition, mute oil free compressor USES air convection principle, to achieve the natural cooling effect.
另外，静音无油空压机采用空气对流原理，达到自然冷却效果。
The experiment for comparing the infiltration affected by entrapped air with free filtration was carried out. It is found that the effect of air pressure is not negligible.
通过自由入渗与恒定土壤空气压力入渗试验结果对比得出，研究入渗问题必须考虑禁锢土壤空气压力的影响作用。
It is concluded that this method with good separating effect and high sensitivity is an idea one to detect the benzene compound in free air.
该方法分离效果好，灵敏度高，是测定大气中苯系物的理想方法。
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