该装置结构简单，使用方便，而且可多次重复使用。
This equipment's structure is simple and uses conveniently. Also it can be used for many times.
其结构简单，成本低，适用范围广，便于开启，可多次重复使用，能保持食品原有的色香味。
The food packaging bag has a simple structure, low cost and wide application range, is convenient to open, can be repeatedly used, and can keep the original color, aroma and taste of food.
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