请打开水洗系统。
2010年3月1日，智利塔尔卡地区发生地震后，当地城市的供水系统遭到破坏，一位居民正用消防栓的水洗头。
Aresident douses himself with water from a fire hydrant as the citywater system remains broken after a major earthquake in Talca, March 1, 2010.
第四步(最终水洗)将酸性溶液冲洗掉，并不断冲洗系统直到出来的水和进去的水的性质相同时。
The Fourth Step (Final Water rinse) - the acidic solution is flushed and the system is rinsed until the quality of the effluent is equal to that of the influent.
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