air renewal meaning in Chinese
换气
空气更新
Examples
- Fire test methods . determination of the opacity of the fumes in an atmosphere without air renewal . part 1 : description of the testing device and method for control and adjustment of the testing device
火的试验法.在空气不更新大气中测定烟雾的浊度.第1部分:测试装置及其控制调节方法的说明