RS232与RS485口有什么区别?
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![RS232与RS485口有什么区别?](/uploads/image/z/11128001-41-1.jpg?t=RS232%E4%B8%8ERS485%E5%8F%A3%E6%9C%89%E4%BB%80%E4%B9%88%E5%8C%BA%E5%88%AB%3F)
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