Baoding Regional differences Economic developing synthetical order Econormic regional coefficient of variability Economic developing total Z index

promote fundamental shifts in the economic system and mode of economic growth

To manage economic affairs according to 1aw;to put economic operation on a legal basis

Trade and Economic Department of Tianjin Finance and Economic Institute

alternating current Variable Voltage Variable Frequency

explosion-proof variable frequency variable speed

function of complex variable complex variable

independent variable×subject variable design

input variable and output variable

LMS algorithm with variable step size and variable

stator variable voltage variable speed

variable capacitor variable condenser

variable diameter and variable pitch

variable flow and variable pressure

VARIABLE FREQUENCY AND VARIABLE SPEED

variable frequency and variable speed motor

Variable Frequency Variable Speed

variable frequency variable speed system

Variable Frequency Variable-Speed System