【纺织；造纸】双层制毡机

Double blade sword,A Double-edged Sword,A Two-Edged Sword,Two-sided Sword

double standard

Double-head counting tablet machine

double-ended grinding machine【机】

double precision exponent part【计】

Lung transplantation (bilateral sequential or en bloc double lung)

double pane

radioimmunoassay double antibody(test)