With the changes in the national policy in the past two years, especially after all regions have taken the lead in the new weight-based charging policy, the production and development direction of various dump trucks has al.......
With the large-scale use of chemical fertilizers, the cost of agricultural production continues to increase. However, in contrast to agricultural production, many times it does not rise and fall. Through analysis, it can be known that this is caused by unscientific fertilization........
If the rotary vane vacuum pump , the oil hole and the pump chamber communicating or exhaust valve, shaft seal, pump cover plane, intake pipe, gas ballast valve and other lax, due to the presence of liquid level difference and the role of gravity and the pump When the chamber is in a vacuum .......
Wireless passive temperature collector system structure
Based on wireless temperature measurement technology, a passive wireless temperature measurement system for power equipment first detects the surface temperature of the device through a temperature sensor, and then transmi.......
School buses are used to transport students to and from schools, and school bus safety has always been a focus of public attention. In order to completely eliminate the hidden dangers of school buses, we must establish a so.......