这里的shall be as per the nominal diamerers 怎么翻译 ...? shall be as per the nominal diamerers 应该是 “按公称直径取用” 整句翻译 the outside diameter of vessel shells and elliptical head shall be as per the nominal diameters in tabel 2. 容器壳体以及封头的外径应按表2中所列出的公称直径选用。(也有“按公称直径圆整”的意思,联系上下文看哪个合适)查看更多