preux有武士风度的PREabbr.Petroleum Refining Engineer炼油工程师preexisting crack原有裂隙predesigned order预先确定好的次序Pre-Chin period先秦Pre- Qin period先秦prefinishing mill预精轧机prefractured rock先在破裂岩prenexnormal form前束范式, 前束形precritical state[化] 临界前状态predefined scalar[计] 预定义标量precast beam unit预制梁构件