prein压平布面方法
PREabbr.Petroleum Refining Engineer炼油工程师
pre-understanding前理解
pre-Qin's culture
pre-stressing bar预应力筋
pre extrusion punch顶挤冲头
Prenanthes scandensn.藤本福王草
predefined function预定函数
preceding switching前级转换
prefabricated forms预制模板
pre-stressed bolt预应力锚杆
pre-filter effect滤前效应