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Ventilation Fan Parts 风机零部件
The welding of electronics parts also produces toxic gases, but management refuses to turn on the ventilation system, except when safety inspectors are present.
焊接电子部件还会产生有害气体，但管理人员拒绝打开通风设备，安全检查人员在场的情况下除外。
Ventilation system by sending the exhaust fan, duct, duct parts, muffler etc.
通风系统由送排风机、风道、风道部件、消声器等组成。
Two patios cut the volume in three parts, allowing natural lighting and ventilation in the darkest areas of the building.
两个庭院将建筑分为三部分，这样在建筑最暗的地方也能得到自然光线和通风。
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