基本解释盘形底；蝶形端板词组短语短语dished drum end 碟形汽包封头dished end plate 碟形端板;凸形封头dished end plate boiler 凸底锅炉;蝶形底板式锅炉;碟形底板式锅炉dished end of tank 变颈段boiler dished end plate 锅炉鼓筒碟形端板;锅炉鼓筒凸形端板专业释义交通运输工程凸形封头