Circuit breakers are divided into high-voltage circuit breakers according to their use range, and low-voltage circuit breakers. The division of high and low voltage lines is relatively vague. Generally, 3kV or more is called high-voltage electrical equipment. Low-volta…
It’s almost National Day. Isn’t the majority of netizens picking up their mobile phones and starting to choose travel tickets? National Day holiday. The airport is full of people, the ticket is definitely difficult to grab, let alone a cheap ticket, what …
As one of the “smart handles†for the electric vehicle and autopilot industries, Tesla has an a…
The turning point of Lewis, that is, the turning point of surplus labor to shortage, refers to the gradual transfer of rural surplus labor to non-agricultural industries in the process of industrialization, and the rural surplus lab…