Fluorocarbon Alloy natural aia fan could bear cold and hot, anti mechanical scar,anti-corrosion. ... alloyMerit: Light weight, high revolving sensitivity, strong corrosion resistance, high air venting efficiency, clean and smooth, uniform color, and easy maintenance ... station to exhaust the dirty and unhealthy air and bring you the clean and fresh air. New type ventilator, fluorine carbon polyester ...