You should not use tap water for the tank, because tap water contains chlorine and fluoride.
您不应该使用自来水的水箱，因为自来水中含有氯和氟化物。
2
Read flow meters, gauges and other recording instruments to measure water output and consumption levels, bacterial content, chlorine and fluoride levels.
检查流量计，压力表和其他记录仪器，测量水的输出水平和消费水平，细菌含量，氯和氟水平。
3
Finally, refineries emit many gases like sulphur dioxide (SO2), nitrogen oxide (NO2), carbon dioxide, carbon monoxide, methane, dioxins, hydrogen fluoride, chlorine, benzene and others.