The paper discusses test and control of aviation hydraulic oils, accessories and filters by use of particle size test device.

本文主要论述利用颗粒度测试仪器对航空液压油、附件、过滤器实施检测与控制的方法。

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It is a kind of fan drive device equipped with high-efficiency air filter. It is used to collect dust particle, hold dust particle and control the pressure in working area.

是一种装有高效空气过滤器的风机驱动设备，用来收集尘粒、容纳尘粒和控制作业区压力。

youdao

It is a kind of fan drive device equipped with high-efficiency air filter. It is used to collect dust particle, hold dust particle and control the pressure in working area.

是一种装有高效空气过滤器的风机驱动设备，用来收集尘粒、容纳尘粒和控制作业区压力。

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