單項(xiàng)選擇題
A.0B.1C.2D.3
A.一短聲B.一長聲C.一長聲和一短聲D.兩長聲
A.180barB.200barC.220barD.320bar
A.160barB.180barC.200barD.230bar
A.240barB.260barC.290barD.310bar
A.20mmB.30mmC.40mmD.50mm
A.清篩車作業(yè)B.挖掘鏈不轉(zhuǎn)動C.清篩車不走行D.機(jī)器靜止時
A.砂子B.污土C.道砟D.碎石道砟
A.下降導(dǎo)槽B.上升導(dǎo)槽C.水平導(dǎo)槽D.振動篩
A.280barB.300barC.330barD.350bar