The annual growth rate of ethanolamine in the world in the next four years will reach 5% to 6%.......

SOLDERING AND SILVER BRAZING Be sure to remember what the recommended valve is for and.......

Fixed air volume valve, is a mechanical self-force device, suitable for fixed air volume ventil.......

Driven by the development of North American construction machinery manufacturers, total sales .......

At present, CB-B gear pumps are widely used in dump trucks and engineering ma.......

Domestic enterprises engaged in the production of slurry pumps and their parts processing, .......

Abstract: The application of high temperature water source heat pump to Dagang Oilfield is .......

I. Background of changes in embedded system design methods The evolution of e.......

The reporter learned from the Science and Technology Department of Guangdong .......