Applications: Main chemical filters for most commercial&industrial ventilation system, with high performance, easy maintenance and raplacement. Microelectronics. Museum, etc.

主要应用： 商用及工业用通风空调系统的主流化学过滤器， 性能卓越，安装维护方便快捷。 电子工厂博物馆。

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The main fuel tank must have all the following: a filler tube, a ventilation system, fuel pickup tube and filter, plus a gauge-sending unit.

油箱必须装备以下元件：加油管、油箱通风系统、吸入管、滤清器和油量传感装置。

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The mechanisms of the noise generated in mine ventilation system, mainly in ventilators and electric motors, are analyzed in detail main measures and ways of noise controlling are put forward.

就矿井通风系统(主要针对通风机、电动机)噪声产生的机理进行了较深入的研究分析，并提出其噪声控制的主要措施与途径。

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But the shut-down schedule also includes upgrades to all four of the LHC's detectors, the shielding of electronics, and even an overhaul of the ventilation system of the tunnel that houses the main accelerator ring.

BBC: LHC switches off for two-year break