同义词
1)two-fiber bidirectional linear switched ring,双纤双向线性倒换环2)bidirectional linear switched ring,双向线性倒换环3)4-fiber-cable both-direc-tion-reuse reversible ring,4纤双向复用段倒换环4)2 fiber bi-directional ring,双纤双向环5)bidirectional multiplex section switching ring,双向复用段倒换环6)bidirectional protection switching,双向保护倒换
