Concerning dustless smoke gas in common rotative Kilm in the cement industry ,the conception of tukutor Esp body static resistance and dynamic resistance are given, the regularity has been studied along with variations of smoke ingredient density , temperature and pressure.

This paper analyzes the equivalent static resistance and dynamic resistance of transistor constant current source through graphical analysis and incremental equivalent circuit analysis, explaining the variations in different conditions and instructing the definition of transistor work condition with transistor constant current source load.

As a result of this electrostatic repulsion, the viscosity of the mixed solution which has excessive ionic surfactant is close to or even lower than the pure polymer solution viscosity.

Then the electrostatic safety characteristics of mandrel removing were determined by simulated experiment on electrostatic electrification between propellant and mandrel,by electrostatic resistivity test and by real-time electrostatic charge monitoring test in mandrel removing process.