問題詳情

32.Which device can serve the purpose of preventing or controlling fluid leakage along a shaft where it passesthrough a wall or diaphragm that separates regions with different pressures?
(A)Bearing
(B)Seal
(C)Frame
(D)Housing

參考答案

答案:B
難度:簡單0.73913
統計:A(2),B(17),C(3),D(1),E(0)

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