国产精品乱码久久久久久软件_高潮又爽又无遮挡又免费_极品熟妇大蝴蝶20p_免费毛片全部不收费的_国产精品爽爽久久久久久蜜臀

Power supply plastic shellIt has been very active in our life. Take our common mobile phone charger case as an example, its main material is made of plastic. A very common feature is that it plays an insulating role. For example, the plastic case of our notebook power supply or the plastic case of electric vehicle power supply is no different from the charger case. They are all made of plastic, In order to prevent electric leakage and improve the safety of our operation, what are the advantages of this power supply plastic shell?

First of all, it is easy to find the advantage that it can protect the power supply. This protection is not only limited to the power supply, but also a great protection measure for our construction personnel. It avoids the leakage and electric shock of some power supplies due to aging wires or irregular operation, and protects the personal safety of our construction personnel to a great extent, Moreover, it can also effectively prevent some dust or external impurities from entering the power supply, thus extending the service life of the power supply itself to a large extent.

Of course, the plastic shell of the power supply can not only have such a protection function. We talked about an insulation function before. This time, we said that the plastic shell of the power supply can play a fixed role. For some fire engines or power switches used at home, they are fixed on them with shells. Of course, the premise of all this is to build a power supply with a plastic shell.

Finally, it is our aesthetic function. People rely on clothes and horses and saddles, and the power supply also needs a shell to set off its temperament. Therefore, it is not unreasonable that there are many kinds of plastic power supply shells circulating in the market. However, when choosing to buy plastic power supply shells, we should also pay attention to their practicality. This is more important and should not be dazzled by the colorful ones.