問題詳情
23. Whichdevice is used in a diesel engine to inject a metered quantity of lubricating oil into thecylinder as the piston ring pack passes the injection points?
(A) Lubricator
(B) Camshaft
(C) Crosshead
(D) Piston rod
參考答案
答案：A
難度：非常簡單1
統計：A(9),B(0),C(0),D(0),E(0)