double double iron

Double function

double function catalyst

double function of electric power and telecommunication

double function shear wall

Double function sofa-bed

double pitch

double pitch roof

Double-function

double-function method

double-function teachers

double-function temperature controlling chip

generalized double function method

sliding windows with double-function

change pitch function

delta function (=δ-function)

function， function key

“double-seat double-vote” system

ball mill with double-inlet and double outlet