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| French | English |
| concentration des porteurs | charge carrier density (de charge) |
| concentration des porteurs | charge carrier concentration (de charge) |
| concentration des porteurs | carrier density (de charge) |
| concentration des traces | track concentration |
| concentration des traces | track density |
| concentration radioactive | volume activity (in Bq/m3) |
| cupule de concentration | concentrating cup (for electron focusing in an X-ray tube) |
| cupule de concentration | focussing cup (for electron focusing in an X-ray tube) |
| électrode de concentration | focusing electrode (grid) |