Graphite rod. Graphite is a form of carbon. Carbon is the basic building block of all organic life on Earth and has numerous uses,including as a filter material,and burning in the form of coal | |
Licence : | Droits gérés |
Crédit: | Science Photo Library |
Taille de l’image : | 2912 px × 4368 px |
Model Release : | Non requis |
Restrictions : | - |