What is the status of China's foreign trade import and export recently?
On April 30th, the Ministry of Commerce held a regular online press conference. The spokesperson said that the current epidemic's impact on China's foreign trade is mainly on the demand side, with...
How to identify the circuit?
Judging the power supply series and parallel circuits, there are roughly the following methods: First, the current flow method Starting from the positive (or negative) side of the power supply, the...
Is the wireless charger radiant to the human body?
Technology is more and more developed, wireless charging replaces wired charging, simple and convenient. Wireless charging technology has obtained 20 patents in 2007. A variety of devices can use a...
New energy car car charger detailed explanation
New energy car car charger detailed Car chargers are an essential component of new energy vehicles, and their market size has expanded with the rapid growth of the new energy vehicle market. In 2016,...