duo-valtstool, duo-valtsraam, duovaltsraam, kahevaltsiline valtstool
kahe valtsi horisontaalasetusega valtstool e valtsraam (vt valtstool; vrd trio-valtstool, kvarto-valtstool, paljuvalts-valtstool), a type of rolling mill stand in which only two rolls, the working rolls, are contained in a single housing (see: stand; compare: three-high stand, four-high stand, multiroll stand)
