heating and cooling system短语¹⁴⁴⁹⁷²⁺² 基本例句 冷热源系统 Tests for dynamic characteristics, terrain traffic- ability, reliability, Failure Analysis and Vehicle Heating and Cooling System are the important parts of road testing. 长期以来由于缺乏有效的技术手段，汽车牵引性能等重要性能参数不能准确测量，涉及到汽车地面通过性等试验难以全面展开。 boshuo