需要用它来对井、沙过滤器、抽水机以及管输水系统进行消毒。
It will be required to disinfect Wells, sand filters, pumps, and piped water systems.
她在她的家里有一个生物沙水过滤器并且以能饮用安全、适于饮用水保持她的家庭健康而自豪。
She has a bio-sand water filter in her home and is proud to be able to keep her family healthy with safe, potable water.
她在她的家里有一个生物沙水过滤器并且以能饮用安全、适于饮用水保持她的家庭健康而自豪。
She has a bio-sand water filter in her home and is proud to be able to keep her family healthy with safe, potable water.
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