SIST EN ISO 5802:2009 - Industrial fans - Performance testing in situ (ISO 5802:2001)
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Heavy Duty Industrial Ventilating Metal Commerical Exhaust Fan Sizes -12/14/16/18/20" Inches (14")- Buy Online in Switzerland at Desertcart - 85458711.
Sutter large capacity fan / stall fan EST140 / fan in Muolen, Switzerland