Otherwise clockwise rotate wheel driving the pole rotate to make the seal body couple with seal that seals the disc in counteraction.

 
  • 反之,順時(shí)針轉動(dòng)手輪帶動(dòng)絲桿旋轉使閥板恢復到密封腔與密封副耦合,反作用下使其密封。
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