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\u3000\u3000\u4e8c\u3001RS485\u63a5\u53e3\u652f\u6301\u7684\u534f\u8bae<\/h2>\n\n\n\n
\u3000\u30001. Modbus\u534f\u8bae<\/h3>\n\n\n\n
\u3000\u30002. Profibus\u534f\u8bae<\/h3>\n\n\n\n
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\u3000\u30005. HART\u534f\u8bae<\/h3>\n\n\n\n
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