Which is better, double-edged or four-edged?

Double knives are four-dimensional S-shaped blades with upper and lower layers, which can cut into the ingredients from more angles, making the ingredients more delicate and uniform and better in taste.

Ice crusher, also called ice planer, is the equipment used by cold drinks shops to make iced drinks. The function of an ice crusher is similar to that of an ice planer. The ice planer can only plane large chunks of ice into ice stubble, which can be used to make ice porridge and shaved ice. The ice crusher is responsible for making small ice cubes.