secondary drain 中文意思是什麼

secondary drain 解釋
輔疏水系統
  • secondary : adj 1 第二(位)的,第二次的;中級的 (opp primary)。2 副(的);從屬的;附屬的;輔助的;補充的...
  • drain : vt 1 排去(水等液體),排泄,放干 (away; off)。2 喝乾,倒空。3 用完,花光。4 使…某物枯竭;使…耗...
  1. 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。
  2. 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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