The unique design of the closed post-valve to prevent flies fly in, cut off the outside air;

独特的后止回阀封闭设计，防止飞虫飞入，隔绝外界气流；

youdao

The unique design of the closed post-valve to prevent flies fly in, cut off the outside air;

独特的后止回阀封闭设计，防止飞虫飞入，隔绝外界气流；

youdao