长城卡扣一般与长城卡双卡封口机共同使用，可用于火腿肠两端、密封胶、炸药封口包装等，其功能就是将规定型号的长城卡扣紧固在封口工序的两端。

The Great Wall buckle is commonly used with the Great Wall card double card sealing machine, it can be used for ham sausage ends, sealants, explosive seal packaging, etc. its function is to fasten the specified type of the Great Wall buckle to the two ends of the sealing process.

长城卡扣箍紧后密封性足够，能够保证需封口工序介质的储存性能。

The tightness of the the Great Wall buckle hoop is sufficient to ensure the storage performance of the medium in the sealing process.