Preum布隆PREabbr.Petroleum Refining Engineer炼油工程师pre-settingn.预定形prebored hole预钻孔preconditiong预处理predepositionn.预淀积pregnanedione孕二酮Preligamental韧带前的preadjustment预先调整prewet screen预湿筛pre-polymer预聚合物precast block预制块

1. The computer solution of a coupling design preblem is included.
   最后还给出了一个联轴器设计问题的求解过程。