bi-directional self-healing ring bshr
... 双向中继 Two-way trunk, bidirectional trunk 双向自愈环 Bi-Directional Self-Healing Ring BSHR 双音多频 Dual Tone Multi-Frequency DTMF ...
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bi-directional self-healing ring bshr
双向自愈环BSHR
以上为机器翻译结果，长、整句建议使用 人工翻译 。