Stopclock. A digital stopclock,of a kind used in school experiments. This clock can be started and stopped either by external electrical signals or manually,and records periods to a precision of 1/100th second | |
Licence : | Droits gérés |
Crédit: | Science Photo Library |
Taille de l’image : | 4195 px × 4194 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |