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DB9\u6bcd\u5934\u5f15\u811a\u5b9a\u4e49\u7b80\u4ecb<\/h2>\n
RS422 DB9\u6bcd\u5934\u5f15\u811a\u5b9a\u4e49\u7684\u4f18\u52bf<\/h3>\n
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RS422 DB9\u6bcd\u5934\u5f15\u811a\u5b9a\u4e49\u7684\u5e94\u7528<\/h3>\n
\u603b\u7ed3<\/h2>\n