供中、小学演示交直流发电机的基本构造和工作原理。
J2417 Manual AC/DC Generator
For the demonstration of the structures and working ,principles of AC and DC generators in the teaching in middle and primary schools.
J2417 Manual AC/DC Generator
For the demonstration of the structures and working ,principles of AC and DC generators in the teaching in middle and primary schools.
鄂公网安备 42058202000086号