·Small SUV market starts price war

Recently, Beijing Hyundai ix25 has a discount of around 20,000 yuan nationwide. For a SUV that is less than 200,000 yuan listed soon, the preferential rate of 20,000 yuan can not help but question the pricing strategy of the car companies.
In fact, the price reduction of Beijing

Valve routine maintenance methods

Valve in the fluid system, used to control the direction of the fluid, pressure, flow device. Valves are devices that allow the flow and stop of the media (liquid, gas, powder) in the piping and equipment and control their flow.

1, the valve storage environment

Neural network CNC machining

Thermal error prediction compensation for numerical control machining based on neural network. The thermal error compensation principle and the structure sensor measure the temperature and thermal displacement values ​​of the corresponding parts of the CNC machine tool, and th