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| synkronoitu digitaalinen hierarkia | |||
| synkroninen digitaalihierarkia; synkroninen digitaalinen hierarkia | |||
| English thesaurus | |||
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| SDH | |||
| SDH (FDDI, ATM, SDH) | |||
| SDH (ITU-T); SDH (SONET) | |||
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| SDH | |||
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synchronous digital hierarchy : 3 phrases in 1 subject |
| Communications | 3 |