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| Opern f | |||
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| Oper f | |||
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| Oper f (One of the music genres that appears under Genre classification in Windows Media Player library. Based on ID3 standard tagging format for MP3 audio files. Winamp genre ID 103) | |||
| Anglais glossaire | |||
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| operational analysis | |||
| Open Process Engine For Reliable Activities | |||
| oil pollution environmental risk assessment | |||
| operational analysis | |||
| out-of-pile expulsion and reentry apparatus | |||
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| o | |||
| A powerful type of drama, where a majority of the words are solely sung. | |||
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operas : 38 phrases, 11 sujets |
| Art | 2 |
| Britannique usage, pas orthographe | 1 |
| Construction | 2 |
| Éducation | 1 |
| Études culturelles | 4 |
| Général | 20 |
| Industrie | 1 |
| Informel | 2 |
| Médical | 2 |
| Optique branche de la physique | 2 |
| Science sociale | 1 |