secondary drain 中文意思是什麼
secondary drain
解釋
輔疏水系統-
15 raw sludge, no matter from primary or secondary settling, will not drain well on sand beds and will usually have an obnoxious odour
生的(未經處理的)泥漿,無論是來源於初次或者二次的沉澱,都不會很好的滲漏在沙床上而且會散發難聞的氣味。 -
The prevention and suggestion is brought up, it is important for a good drain system for preventing soil secondary salinization, it can lowerer the underground water lever and ejecter the soil salt in order to adapt to douche and drain
為了防止土壤次生鹽漬化,良好的排水系統是非常重要的,它可以降低地下水位和排出土壤鹽分,做到灌排配套。
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