What's the requirement for the forced ventilation system for crankcase?

发动机曲轴箱强制通风的要求?

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Adequate supply of respirable air and effective forced ventilation have been provided?

有足够可供呼吸的空气和提供机械辅助通风?

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Electrical gear unit is a DC motor with forced ventilation that exchanges electrical to mechanical energy.

电动轮设备就是带强制风冷的直流电动机,可将电能转化为机械能.

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With forced ventilation the direction of rotation is marked by arrow on the forced ventilation itself.

强制通风时,标出的旋转方向箭头,是与强制通风本身不同的方向.

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Forced ventilation should be provided when applying paint in confined spaces or stagnant air.

在狭窄处或空气不流通处施工,必须提供强力通风.

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