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| N-unità dati di servizio; unità dati di servizio di uno strato | |||
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service-data- unit of a layer : 4 phrases in 1 subject |
| Communications | 4 |
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Add | The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Report an error
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