optical transceiver board
... 光时域反射计Optical Time-Domain Reflectometer OTDR 光收发板Optical Transceiver Board OTB 光收发模块Optical Transceivers ...
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短语
二次群光收发板
Optical Transceiver Card For Secondary Group
光线路收发板
optical line transceiver board
光纤收发板
fiber transceiver board