drainagen.排水;排水系统;污水;【医】引流(法),导液(法)
drainage wind重力风
drainage strip引流条
drainage probe引流探针
drainage right排水权
drainage water排水; 废水
drainage sieve脱水筛
drainage ditch排水沟
Drainage angle引流角
drainage ratio迳流率,迳潦
Drainage pipes引流器