Ventilation is concerned with the supply of fresh air, the removal of contaminants and heat. 通風涉及的是新鮮空氣的供應，污染物和熱量的排除。
The engineer must analyze the existing stringers and beams for stress reversals caused by the removal of columns or walls and the positioning of the temporary support. 工程師一定分析現有的橫樑和為由柱或牆壁和暫時的架定位的排除所引起的應力翻轉的梁。
We ask you to cover the expenses of defect elimination. 我們請貴方承擔排除故障的費用。
In case of abnormal noise or excessive vibrancy during the running, it is necessary to stop the machine immediately to check and remove the faults. 運轉過程中，如發現異常雜訊或過大振動應立即停機檢查，排除故障。
