subsurface drainage

常見例句

雙語例句

• The subsurface pipe drainage came into being just in the metaphase of20th century. It was broadly applied in USA, Japan and Egypt for30~40years.
  暗管排水在20世紀中期初步形成，近30～40年在美國、日本、埃及等國家得到廣泛應用。
• However, when irrigation application decreased by 25% the salt accumulation in root zone will not be obvious and the subsurface drainage flow will decrease by 31.4%.
  現狀灌溉用水量減少25%時，作物根區(qū)沒有產生明顯的積鹽，地下排水量減少31.4%。
• Several methods of determining the optimal space and depth of subsurface plastic drainage tubes are explicated and summarized in this paper.
  本文介紹了農田塑料暗管埋 深和間距的確定方法，并對之進行了評述。
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