关于aspen plus里面的pipe计算? 帮助文件里面来了一句 Correlationsfor Connection type (Flanged welded or Screwed) and fittings (Gate valves,Butterfly valves, Large 90 deg. elbows, Straight tees and Branched tees) are from a proprietary source. 只有5个模型也就不说啥了 而且就一个当量长度的东西还整什么专利所有 至于么。。 查看更多19个回答 . 2人已关注