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On a two-axle truck, what is the forward distance?
兩軸卡車的前向距離如何定義？
Forward distance on a rigid vehicle excludes folding mirrors.
剛性車輛前向距離的測量不包括可折疊後視鏡。
閱讀相關知識
Measure from the rear axis to the front of the vehicle or load, whichever is further forward. The front axle is not the rear reference point.
從後軸基準線量到車輛或貨物最前端，以較前者為準；不能把前軸當成後方基準。