In use process, just pull up and down two times, yarn nets yarn nets in the yarn box under the action of dust brush can remove the dirt, natural adhesion to avoid the congregation. Remove the cleaning Due to the exit yarn box with dust brush can completely eliminate mosquitoes crawling into the interior Fashion modeling, used in all kinds of novel window type, solve the internal and external assembly outside outfit screen and glass frame, the friction of the phenomenon can be hidden in a line of flexible wind groove, craftsmanship is provided alone. Thoroughly solved the line of noise, a knock glass screens of the industry is a major breakthrough, with wind function, 6-7 class gale yarn nets also not when a slot prolapse,