A.8t兩輪壓路機(jī) B.16t兩輪振動(dòng)壓路機(jī) C.8t羊足碾 D.16t膠輪壓路機(jī)
A.暗溝 B.滲井 C.截水溝 D.急流槽
A.0.3 B.0.5 C.0.8 D.1