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RS232\u7684\u7279\u70b9<\/h3>\n
RS232\u7684\u5e94\u7528<\/h3>\n
RS485<\/h2>\n
RS485\u7684\u7279\u70b9<\/h3>\n
RS485\u7684\u5e94\u7528<\/h3>\n
RS422<\/h2>\n
RS422\u7684\u7279\u70b9<\/h3>\n
RS422\u7684\u5e94\u7528<\/h3>\n
\u603b\u7ed3<\/h2>\n