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| proton exchange film (sheetikoff) | |||
| proton exchange membrane (для топливных элементов) | |||
| PEM (Proton Exchange Membrane sega_tarasov) | |||
| pem (proton exchange membrane) | |||
| proton-exchange membrane | |||
| протонообменная мембрана: 14 phrases in 5 subjects |
| Energy industry | 1 |
| General | 5 |
| Makarov | 6 |
| Nanotechnology | 1 |
| Technology | 1 |