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| Σ1; φυλάσσεται κλειδωμένο | |||
| English thesaurus | |||
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| fast wave (S1 MichaelBurov) | |||
| personnel office (Cmilana); personnel officer (Киселев voen14); personnel staff officer | |||
| the first peak measured by Rock-Eval (S1 is the milligrams of hydrocarbons that can be thermally distilled from 1 gm of rock); lower Silurian | |||
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| Personnel Staff Officer | |||
| battalion or brigade manpower and personnel staff officer (Marine Corps battalion or regiment) | |||
| First Sacral Vertebra | |||
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| first heart sound | |||
| S1: 14 phrases in 6 subjects |
| General | 3 |
| Industry | 1 |
| Medical | 4 |
| Natural sciences | 2 |
| Statistics | 2 |
| Technology | 2 |