Food Packaging Machine. Frequency-converting, computer photoelectric automatic tracking,packing rate reach to 100%, 1, Main Technical Parameter: ... : 12-34(length of bag)×10-28(width of bag)×6-20(height of bag)mm Shape : Round slice ,ellipse,waist round,cylindrical ,oblong ... double twist packing. 3, Usage: This machine is applied for the double twist packing of grains, such as candies, beef granules, ...