Explain the purpose of o-ring, wearings in the centrifugal pumps?


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dear all i am a civil engineer (diploma) have 9 years experiance in construction fields and specalised works. (have oil and gas experiance also) i am willing to work in offshore rig jobs? what is the basic qualifications of that job? i need some advice and idea from offshore members? pls post the answers for me sirs. thank you

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Why o-ring, bearings are used in the centrifugal pumps?

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