| 释义 |
PPAPPA1.■=Parallel Processing Automata 并行处理自动机;2.■Polymer Permeation Analyzer 聚合物渗透分析器;3.■Polyphosphoric Acid 聚磷酸;4.■Preliminary Pile Assembly 实验性反应堆;5.■Produce Packaging Association 产品包装协会[美];6.■Produce Packers' Association, Ltd 产品包装商协会[英];7.■Publishers Publicity Association 出版商广告协会[美] |