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422\u8f6c232\u63a5\u7ebf\u539f\u7406<\/h2>\n

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  RS-422\u548cRS-232\u4e4b\u95f4\u7684\u5dee\u5f02<\/h3>\n

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  422\u8f6c232\u63a5\u7ebf\u6b65\u9aa4<\/h3>\n

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422\u8f6c232\u63a5\u7ebf\u5e94\u7528\u573a\u666f<\/h2>\n

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  \u5de5\u4e1a\u63a7\u5236\u7cfb\u7edf<\/h3>\n

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  \u901a\u4fe1\u8bbe\u5907\u4e92\u8fde<\/h3>\n

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\u603b\u7ed3<\/h2>\n

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