How to push and pull the switch button of mosquito-proof window up and down to massage?

press down and push out. Press the buckle down and then push it out, and the screen window will open. One is to use chemical fiber as raw material. It's a very thin cloth. Generally matched with curtain cloth. A layer of cloth. A layer of yarn. A gauze screen pasted on doors and windows becomes a window screen, which is a mesh widely used in doors and windows and corridors to prevent small insects from disturbing. Most of them are made of nylon, and the common colors are white, green and blue. Sometimes called screen window.