較淺的地表汙染嚴重,特別是重金屬,所以淺井的水還不行, 還要打穿過岩石層取水才行,這可是需要大大的投資:)
較淺的地表汙染嚴重,特別是重金屬,所以淺井的水還不行, 還要打穿過岩石層取水才行,這可是需要大大的投資:)
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