| 释义 |
润滑油rùnhuáyóu涂在机器轴承等摩擦部分的油质,作用是润滑、冷却和用来密封等,一般是分馏石油的产物,也有从动植物油中提炼的。{lubricating oil; lubricant; oil refinery product or animal or plant extraction to be applied to the axle or other frictional parts of a machine in order to lubricate, cool down or seal} |