Neutral pH-7 displayed on a digital pH measuring device (ECO pH pH-Pocket-Tester by Step Systems) | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Photostock-Israel |
Taille de l’image : | 3419 px × 5147 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |