Electric Motor Open Model Graduated Design: The flask is

Graduated Design: The flask is graduated for easy volume measurement

meeting stringent quality requirements for pharmaceutical and laboratory use

Low-Z Dynamic handheld microphone

On sturdy streamlined base with provision for vertical or horizontal use

From Martellia to Neocalamites

Electric Motor Open Model Graduated Design: The flask isElectric Motor Open Model It can demonstrate the structure and principle of DC generator and AC generator. Th specific principle is the closed principal iron ring. The inner side is equipped with a pair of electromagnets. The coils of the two electromagnets are connected in series, and the binding posts are mounted on iron ring. Via operation, you kids know how motor works, cultivate children's curiosity about science, and regard science as a child's