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Test methods are weighing method and conductivity method, two method has its advantages and disadvantages.
查验办法有称轻法和导电率法, 两栽办法各有其优缺不面.
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英汉翻译词典包含4367426条英汉汉英翻译词条,基本涵盖了全部常用英语单词及常用语的翻译及用法,是英语学习的有利工具。