lub oil短语¹⁴⁴⁹⁷²⁺² 基本例句 经润滑油 This paper gives a method of lubrication system design for motorcycle engines. The basic principles and methods for the determination of oil pump and lub oil pressure are introduced in this thesis. 本文介绍了摩托车发动机润滑系统的设计思路和设计方法，重点介绍了循环供油量和供油压力的估计方法以及机油泵的设计计算步骤。 cnki