每个MIDI设备有三个连接器：MIDIIn、MIDIOut和MIDIThru，它们能将设备呈菊花链状连接起来。
Each MIDI device has three connectors; MIDI in, MIDI Out and MIDI Thru that allow devices to be daisy-chained together.
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优化设计了旋转连接器中的红外光链路。
The infrared data link in the rotary joint was optimized.
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