Time of contact with noise shall be strict controled according to national noisestandard.
应严格按照国内噪声标准确定工人接触噪声时间。
2
The noise coming from the air-conditioning equipment used by units or self-employed workers shall conform to the environmental noisestandard for the locality.
单位和个体经营者使用空调设备产生的噪声，应当符合城市区域环境噪声标准；
3
The noise pollution is the main object of the environmental pollution which should be controlled in the 21st century, and the noisestandard provide basis for controlling noise.