40吨平板车使用说明书40吨低货台半挂车使用说明书目录一、半挂车主要技术特性−−−−−−−−−−−−    3二、主要总成的构造、维修及调整−−−−−−−−    41.车架总成−−−−−−−−−−−−−−−−−    42.悬挂总成−−−−−−−−−−−−−−−−−    43.轮轴总成−−−−−−−−−−−−−−−