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Terms for subject General containing 封口的 | all forms | in specified order only
ChineseEnglish
假定一个开口朝上的气筒用一个活塞封闭起来suppose a cylinder with open end up is closed by a piston
只需涂胶水封口的已印有邮票的信封gummed only
封口处全部涂胶水的信封gummed all over flap
封口unsealed