Consists of a coil of iron bars around a thousand inside consists of a magnet on the bottom. When electric current flows through the coils around the iron bars of a thousand. Make the lower series steel rods have powers of magnetic steel bar pull down on the series come together, make a full range of work. When the circuit is cut off electricity to the iron bars in the lower section of the magnetic power. Spring will push the steel bar back to normal position.
การแปล กรุณารอสักครู่..
![](//thimg.ilovetranslation.com/pic/loading_3.gif?v=b9814dd30c1d7c59_8619)