Current urgent demands for energy-saving and consumption reduction were described along with the technical theory of a rotor-assembly type intensified heat-transfer device—"Clean-energy Core".

As there were leak on contact place between shaft and rotor body in built up hollow rotor, dropping discharg gas speed of pump and efficiency applied of oil sealed sliding vane rotary vacuum pump.

A new type generator with hybrid rotors was studied,which operated constant voltage over a wide rang of speeds.