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空分操作工

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离心式低温液体泵多采用充气迷宫密封,密封气为(),气体压力要高出低温泵的叶轮背压()左右

  • A、氧气,0.02MPa
  • B、仪表空气,0.01MPa
  • C、仪表空气,0.02MPa
  • D、高压氮气,0.01MPa
正确答案:B
答案解析:
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