O形橡胶密封圈在各种机械密封中应用普遍。有一些特殊密封圈很难在市面购到,如我厂生产φ244开窗侧钻工具急需几种O形高压橡胶密封圈,在市场上无法买到。我们根 O-shaped rubber seals in a variety of mechanical seals used widely. There are some special seal is difficult to buy in the market, such as my factory production φ244 window drill tools urgently need several O-shaped high-pressure rubber seals, can not be bought on the market. Our roots