1·These essential extreme pressure properties prevent the rupture of the lubricating oil film within the impact mechanism, where both reciprocating and rotating motions are employed.
这些基本的极压特性，可防止油膜于往复式及旋转式的撞击情形下破裂。
2·Lubricating oil inside the engine produces a film on the moving parts.
发动机内部的机油在运动部件上形成一层膜。