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It is very difficult for us to put up the milk from a carton.In fact,every carton can hold about 0.5ml milk.The world produces 100 million tons of milk a year.The residual milk in carton will cause great waste.We made one crease and two Cut lines on the side of the milk carton.When we finished a carton of milk,do as the diagram under this paragraph to drain the residual milk.
Hebei University of Technology