"labored their arduous way up the mining valley"; "a grueling campaign"; "tough labor"; "heavy function"; "heavy going"; "spent a lot of laborious several hours about the project"; "established a punishing speed" The vertical blade configuration allows for the actuator to be mounted down below the damper and it is perfect https://dampers-for-industrial-se90011.losblogos.com/35870198/not-known-details-about-heavy-duty-stainless-steel-damper-manufacturers