很多工厂都让毒气和毒烟排放到空气里。
Many factories allow poisonous gas and smoke to escape into the air.
磷已发现毒催化转换器是一个重要组成部分的排放系统。
Phosphorus has been found to poison catalytic converters which is a major part of the emission system.
铬毒零排放及资源完全利用新方法，是处理金属铬和铬盐生产过程中排放的废渣。
A complete utilization new method of zero discharging chromium poison and resource is used to process the waste residue which is discharged in metal chromium and chromium salt producing process.
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