Based on the theory of air-supply jet, the conception and theory of the air quality and the drain-contamination efficiency, the results achieved by comparing th
Based on the principle of the electric-magnetic check-measure, this paper puts forward a new technology and method that use the magnetic marks to check and meas
This paper introduces the performances of compund gear pump.Based on the target of having the smallest mass per unit volume,the paper established a mathematical
The mathematical model and the numerical simulation for the transfer of coal-bed methane were established based on the combination of the porous flow theory and