A disc valve control means
Active ridge vent
Adjustable air outlet nozzle for automobile heating and venting
Adjustable ball valve
Adjustable bearing structure for butterfly gate valves
Adjustable eccentric valve
Adjustable seat for butterfly valves
Air control apparatus for forced air central air conditioning sy
Air control damper assembly
Air control device for internal combustion engine
Air control device for internal combustion engine
Air discharge installation for the air feed into the interior sp
Air distribution device
Air flow control system
Air flow louver system
Air inlet valve for rooms
Air outlet
Air outlet device
Air passage switching door
Air passage switching system for air conditioner