Micro fluid variable-focus lens
variable focus condenser
variable focus condensor
variable focus lens vari-focus lens
variable focus objective
variable focus zoom lens
vari-focus lens variable focus lens
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