單項(xiàng)選擇題
A.1m B.0.8m C.0.6m D.0.4m
A.30° B.40° C.45° D.60°
A.10mm B.20mm C.30mm D.40mm
A.4000mm B.5000mm C.5100mm D.5200mm
A.4000mm B.4200mm C.4400mm D.5000mm
A.20mm B.30mm C.40mm D.50mm
A.9號(hào) B.11號(hào) C.12號(hào) D.18號(hào)
A.5m B.3m C.2.5m D.2m
A.160mm B.150mm C.130mm D.125mm
A.210mm B.150mm C.140mm D.110mm
A.起道搗固 B.墊調(diào)高板 C.清篩利于排水 D.清篩換砟起道搗固