- 單向 one-way; unidirectional; sim ...
- 排水 drain off water; drain away ...
- 土層 solum; true soil; pedosphere ...
- 單向排水 single drainage; single-slope drainage
- 不透水土層 impermeable ground
- 含水土層 aquiclude; aquifer
- 漫水土層 submerged earth
- 透水土層 permeable ground; pervious ground
- 單向排列 unidirectional spread
- 單向排氣扇 discharge fan
- 側(cè)向排水 chevron drain; lateral drainage
- 橫向排水 cross drainage; tra verse drainage; transverse drainage
- 橫向排水溝 cross drainage; cross gully; lateral; transverse drain ditch
- 橫向排水管 transverse drain
- 逆向排水 backward drainage
- 逆向排水井 inverted drainage well
- 豎向排水 vertical drainage
- 雙向排水 double drainage; double-slope drainage
- 順向排水系 consequent drainage
- 斜向排水溝 batter drainage
- 縱向排水 longitudinal drainage
- 縱向排水溝 longitudinal drainage
- 分子單向排列 straight molecular orientation
- 亞土層排水 subsoil drainage
- 豎向排水砂井 vertical sand drain
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