Designs 1221-DOW and 1221-OW are "away from wall" substantial general performance mixture fire/smoke damper precisely designed for programs the place the damper can not be installed in the airplane with the wall or floor. They functions Nailor’s exclusive inter-locking double skin airfoil blade structure that removes combustible seals and presents flame and smoke https://heavy-duty-stainless-stee57890.pages10.com/detailed-notes-on-heavy-duty-stainless-steel-damper-manufacturers-72330959