边吃奶边添下面好爽,2012免费观看完整版在线播放,小雪的13又嫩又紧又多水,少妇人妻系列1～100,秋霞av无码一区二区三区试看

The action principle of PPTC resettable fuse is a dynamic balance of energy. The current flowing through the PPTC element will generate heat, which is due to PPTC. All or part of the generated heat is dissipated into the environment, and part of the heat that is not dissipated increases the temperature of the PPTC element. It can be widely used in telecommunications and networks, computers and multimedia, industrial and automotive industries, batteries and portable electronic equipment and other industries.