- time domain reflectometer
- 时域: time domain
- 反射: reflect
- 计: count; compute; calculate; n ...
- 光时域反射计: optical time domain refectometer; optical time domain reflectometer,otdr; optical time-domain reflectometer otdr; optical time-domain reflectometers (otdr)
- 光学时域反射计: optical time domain reflectometer; optical time domain reflectormeter
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