The best playground suppliers in China:
1.Guangzhou Chime-Long Paradise, Guangdong Province;
2.Shenzhen Happy Valley, Guangdong Province;
3.Changzhou China Dinosaur Land, Jiangsu Province;
4.Shanghai Happy Valley;
5.Hong Kong Disneyland
Waste PCB has a variety of recyclable precious metals, such as tin, copper (high in circuit), gold, silver, nickel, palladium, and other non-metallic materials.
Open circuit: The circuit is in an open state and there is no current in the circuit; That’s to say. It doesn’t work.
Closed circuit: The circuit is in a closed state and there is current in the circuit. In other words, it works as normal.
The purpose of laminating an iron core in transformers:
1)Reducing the formation of Eddy current in the Iron Core;
2)Increasing the resistance of Iron Core;
3)Reducing electric energy convert into internal energy of Iron Core.
4)Improving tran