DCN-DISBDD buttons for dual use discussion Units replace the single microphone button on a discussion unit when used in dual delegate mode.
当讨论机设置成双代表机时，需用DCN - DISBDD双代表按钮替换原装的单个话筒按钮。
DCN-DISBDD buttons for dual use discussion Units replace the single microphone button on a discussion unit when used in dual delegate mode.
当讨论机设置成双代表机时，需用DCN - DISBDD双代表按钮替换原装的单个话筒按钮。
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