我厂1972年生产的国际硬卧车,其采暖装置仍采用温水循环独立锅炉,为了适应在寒冷地区运用的要求,车体绝热材采用了现车发泡的硬质聚氨酯泡沫塑料,发泡层厚约50毫米左右;车窗分成上下两截,下窗采用固定式,上窗可用手摇机构提升开启,活动 I produced in 1972 the international factory production of hard sleepers, the heating unit is still using warm water cycle independent boilers, in order to adapt to the requirements of the cold areas, body insulation used car foam rigid polyurethane foam, foam layer thickness About 50 mm; the window is divided into two sections up and down, the lower window with a fixed, upper window can be used to enhance the hand crank open, activities