If oil steam affects the system, can use special (very expensive) steam directly from the oil filter in the compressed air to remove oil vapour adsorption.
如果油蒸气影响涂装系统，可以采用特种(非常昂贵)的油蒸气过滤器直接从压缩空气中吸附油蒸气加以去除。
2
They would know that in very cold conditions it becomes a solid called ice, and that when heated on a fire it becomes a vapour called steam.