说明：  一个关于滑动轴承流体动力润滑的书，张直明写的。对于滑动轴承润滑方面有很深的理论支撑，且对于这方面的编程也非常有帮助。
(A book on hydrodynamic lubrication of sliding bearings, written by Zhang Zhiming. The sliding bearing lubrication has deep theoretical support, and this aspect of programming is also very helpful.)