油封是防止机械上的润滑油、水、药液及气体等介质由间隙中漏出的重要机械部品,同时防止沙尘由外部进入。
Oil seals are devices used to seal oil inside a machine or parts of equipment. It prevents the grease, Lubricant,water,chemical fluid,etc from leaking out of machinery, and simultaneously prevents the intrusion of dust, sand or other foreign objects from outside