This machine is commonly known as "soy flour machine", also known as 
trace powder adding machine and trace element adding machine. Suitable for 
continuous quantitative output of powder objects. Because of its excellent 
performance and innovation, it has been reviewed and approved by the 
National Patent Office as a patented product [ZL201520870295.8]. It is widely 
used in many industries such as food, feed processing and chemical 
production.