内部材料 meaning in English

interior materials

Road vehicles , and tractors and machinery for agriculture and forestry - determination of burning behaviour of interior materials
道路车辆农业和林业用拖拉机和机械.内部材料耐燃性能的测定
Road vehicles , and tractors and machinery for agriculture and forestry . determination of burning behaviour of interior materials
道路车辆农业和林业用拖拉机和机械.内部材料抗燃烧特性的测定