: increased in amount or quality than the common of its type or class: like a : of unusually significant sizing or volume a heavy turnout Designs 0110DOW, 0120DOW, 0110GOW and 0120GOW are "out of wall or flooring" integral sleeve static curtain form fire dampers.  Model 0110GOW and 0120GOW are https://heavydutystainlesssteelda46788.qodsblog.com/37115502/heavy-duty-stainless-steel-damper-manufacturers-an-overview