Peak flow meter. Man using a peak flow meter (spirometer) to measure his respiratory output and therefore the strength of his lungs | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Marazzi, Dr. P. |
Bildgröße: | 5124 px × 3410 px |
Modell-Rechte: | vorhanden |
Restrictions: | - |