preemn.初次上演
PREabbr.Petroleum Refining Engineer炼油工程师
Pre-Mesozoic前中生代
pre-assemblyn.前部件
pre-location预定位
pre - heater换热器
prelubrication预先润滑
Pre-injector预注入器
pre-twisting预变形
preheating pot预热锅
pretax earning税前收益
precoat tilter覆盖式过滤器