Preta普雷塔
PREabbr.Petroleum Refining Engineer炼油工程师
pre-pressing预压
Pre-Cambriann.【地】前寒武纪;adj
premolar teeth前磨牙,前臼齿,槽牙
predial tithes[法] 什一税
preclorination预氯化
pre compactionn.预压(初步压块)
pre-alloying预合金化
Pre-oxidlzed预氧化
preinsecticide杀虫剂前体
premixed flame预混焰