绪言由于近几年凿岩机的惊人发展,它的各部分零件已达到了高质量、高精密化。可是实际上使用是在环境恶劣的条件下进行的,所以使用不适当的润滑油即使是好的机器也会因为寿命短而不得不必须很快地替换零件。因而在这样的条件下,关于在长时期里 Introduction Due to the amazing development of rock drills in recent years, all parts of it have reached high quality and high precision. However, the use is actually carried out under harsh conditions, so using an improper lubricant even a good machine also has to be replaced quickly because of its short life. Thus in such conditions, about the long period