DIN EN 61753-089-2 (2011-02)被替代
Fibre optic interconnecting devices and passive components - Performance standard Part 089-2: Non-connectorised single-mode bidirectional OTDR monitoring WWDM devices for category C - controlled environment (IEC 86B/3124/CD:2010)
出版：German Institute for Standardisation (Deutsches Institut für Normung)
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