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This product is to help people to record time to confirm whether the items in the item exceeds the safety time. For example, people now can use cling film to preserve food, and then the refrigerator. But sometimes, you will forget what time to put in, then, will often throw away food directly, resulting in waste of food. This design can avoid this situation.
北方工业大学
亚洲, China
磊 刘,
北方工业大学