The closed environment of greenhouses will cause the carbon dioxide concentration in the greenhouse to be insufficient, affecting the growth and development of crops. In order to be able to use the modern electronic equipment to measure and control the carbon dioxide concentration ac…

The modified ultra-high molecular weight polyethylene roller is a new generation of high-tech products developed by Huabei Industrial Plastics Equipment Co., Ltd., which is used to replace the bulky and backward metal idler currently used.

The modified ultra-high mole…

【Abstract】 In order to meet the requirements of China's air pollution prevention and control law for the emission of vehicle diesel engines, an electronic control system of variable pre-stroke pump was developed in light of the current development of diesel engines in China…