两者之间通过专线MODEM相连。山下控制板主要功能是：将操作人员的开关信息转换成指令，发送给山顶控制板，并根据山顶控制板发来的电源通断状态报告指令，以指示灯的形式显示给操作人员。-MODEM connected through the line between the two. Yamashita panel main functions are: the operator switches to convert the information into instructions sent to

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