英语词汇plain seal怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	plain seal
释义	plain seal 简明释义普通封印：一种简单的封印方法，通常用于封闭文件、信件或包裹。网络释义短语 1 PLAIN SEAL FASTENERS 平原密封紧固件 2 plain seal around the reservoir 平原围封水库 3 PLAIN ENCASED SEAL FASTENERS 普通包裹密封紧固件双语例句 1 It is difficult to find out an engineering example that plain cushion self-tight seal applied to tubesheet seal in domestic and overseas references. 综观国内外各类文献资料，很难查到平垫自紧密封结构应用于换热器管板密封的工程实例。
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