火腿肠作为一种高温食品，也是深受广大消费者欢迎的一种肉类食品，其特点是肉质细腻、鲜嫩爽口、携带方便、食用简单、保质期长。但如果封口不严，或者食品涨袋，则不能食用，这就涉及到食品封口问题，长城卡扣是一种用于火腿肠两端封口的紧固件，不要看它小小的，它的作用非常大，有效阻止氧化，腐败，不受细菌骚扰，保证火腿肠的储存保鲜。
As a kind of high temperature food, ham sausage is also a kind of meat food welcomed by consumers. Its characteristics are delicate meat, delicate and refreshing, easy to carry, simple to eat and long shelf life. But if the seal is not strict, or food bags are bulging, it can not be eaten, which involves the problem of food sealing. The Great Wall buckle is a fastener used to seal the ends of ham sausage. Don't look at it small, it has a very big role, effectively prevent oxidation, corruption, not disturbed by bacteria, to ensure the storage and preservation of ham sausage.