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| light ends | |||
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| head (при перегонке) | |||
| forecut (igisheva); forerun; foreshot; overhead | |||
| head fraction (топлива) | |||
| top product (при перегонке) | |||
| head faction; top-product | |||
| heads fraction | |||
| heads (при перегонке) | |||
| heads | |||
| overflash (вещество MichaelBurov) | |||
| first running (при переработке нефти); forerunnings; head fraction; light fraction; overhead fraction | |||
| heads draws; first running | |||
| головные фракции: 9 phrases in 6 subjects |
| Alcohol distilling | 1 |
| Chemistry | 1 |
| Makarov | 2 |
| Medical | 1 |
| Oil / petroleum | 1 |
| Technology | 3 |