A.3.8±1.2mmB.2.5±1.5mmC.2.7±1.5mmD.4.5±1.1mm
A.2.7±1.5mm,4.3±1.5mmB.3.3±1.5mm,1.5±1.6mmC.4.3±1.5mm,2.7±1.5mmD.4.3±1mm,2.5±1.5mm
A.车辆与墙有4~10米的距离B.环境亮些更利于工作C.环境暗些更利于工作D.车辆与墙垂直停放