无码亚洲成a人在线观看九九_99久久婷婷国产综合精品电影_艳妇臀荡乳欲伦岳txt免费下载_国产人与zoxxxx另类_先锋影音av成人资源_午夜dj在线观看免费视频_把水管开水放b里是什么感觉_撩起秦卿长长的发丝_黄色毛片大全

What is the floating seal?

A: The floating oil seal mechanical seal is made by a pair of iron alloy material floating face seal ring (referred to as the floating seal ring) and a pair of rubber ring composition, half of the rotation with the rotating parts, half of them relatively stationary two floating seal ring each other close to the face known as the sealing surface, also known as the bright band.