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The snag can be used to keep documents and photos. Its head is similar to the design of clip which keeps the documents or photos intact when pun up a wall.
When we cut vegetables will often appear food stuck on the knife. This type of knife in the upper part of the blade design for a small bumps. In this way, the knife will cut vegetables because the protuberant and cannot stick on the sword effectively improves the efficiency of cutting .
Song yijun Ji nan Ren jie