sealedadj.封口的；密封的动词seal的过去式和过去分词.sealn.封条；印章n.海豹v.密封；盖印；明确sealed container气密封罐,密闭集装箱,密封容器seal by B-ring[化] B型环密封seal improvement密封改造sealed headpiece密闭头盔sealing adhesive封口胶sealing concrete封混凝土sealed-bearingn.油封轴承sealcontact face密封面sealing schedule密封程序sealed reservoir封闭油气藏