... the flame elastic space than the QRB1/QRB1Z general electric eye strong times.In four, Songran biological oil ... press, cam and shaft combination1, two fire air door adjusting cam;In 2, complete, i.e. ... damper opening degree;In 3, a fire air door adjusting cam;4, two fire electromagnetic valve cam ... the combustion and air conditioning, the methanol adjusting door is not only economic, but also can greatly ...