Hiểu vòng đệm làm kín là gì. Xác định xem có cần thay vòng đệm làm kín cửa tủ lạnh không. Cân nhắc sửa vòng đệm nếu được.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Every refrigerator has one. This is a gasket (or seal) that is made out of molded rubber.  The function of the gasket is to keep cold in and to keep heat out of the refrigerator. Essentially, it seals the colder air in, and prevents air outside the refrigerator from seeping in. The reason this matters is because a bad or worn seal will allow cold air to leave the refrigerator, and warm air to enter it. This means that temperatures in the refrigerator could increase, causing the food inside it to