Adjustable roof ventilator jack
Blowing port for clean air of an apparatus for washing semicondu
Device for removal of deleterious impurities from room atmospher
Dust extraction shroud for a power tool
False-ceiling construction and method for the flow of air in con
Fume removal work station
Gas injection apparatus and process to form a controlled atmosph
Method and an apparatus in ventilation
Method and system for air-conditioning a coating station for a p
Method and system of cleaning industrial air
Placing unit for a human being
Suction and exhaust device
Tornado type intake and blowing device
Ventilation hood with enhanced particle control and method of us