国产成人在线观看_青青草91视频_日韩一二在线_天天操91_国产精品内射后入合集_四库成人免费视频

Ash discharge valve (rigid impeller feeder, star feeder, air shut-off, rotary feeder, etc.) is the main equipment for ash discharge, air supply and other equipment feeding of dust catcher, suitable for powder material and particulate material.It is widely used in environmental protection, metallurgy, chemical industry, grain, food, electric power and other industries.