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)