The Deerma dust mite remover adopts ultraviolet sterilization method and is equipped with strong suction, which can effectively remove mites accumulated on beds, mattresses, sheets and sofas, reduce the occurrence of skin and respiratory allergies, and provide a healthy and comfortable living environment for the family. Deerma Dust Mite Remover,Deerma dust mite controller, mite reducer, mattress vacuum cleaner Guangxi Nanning King Green Smart Co., Ltd. , https://www.kinggreensmart.comStopcock is a closed or plunger-shaped rotary valve that opens or closes by turning 90 degrees to open or close the port on the valve plug to the port on the valve body.