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Between which two points is the forward distance of a two-axle truck measured?
两轴卡车的前向距离是在哪两个基准点之间测量的？
For a two-axle rigid truck, forward distance is measured from the rear axis to the front of the vehicle or load, whichever is further forward.
两轴刚性卡车的前向距离，从后轴基准线量到车辆或货物的最前端，以更靠前者为准。
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Folding mirrors are excluded. This measurement is different from the wheelbase, which is measured between the axles.
可折叠后视镜不计入该前向距离；不要与前后车轴之间的轴距混淆。