阀门密封材料采用全氟弹性材料或氟橡胶，在阀门关闭之后会充气膨胀。
The valve seal material can be Perfluoroelastomer or Viton, and it is designed to inflate after the valve segment is closed.
阀门密封材料采用全氟弹性材料或氟橡胶，在阀门关闭之后会充气膨胀。
The valve seal material can be Perfluoroelastomer or Viton, and it is designed to inflate after the valve segment is closed.
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