99 滑油以壓力方式潤滑機件，下述機件何者無需潤滑作用?
(A)噴油嘴 (Fuel Oil Nozzle)
(B)主軸承 (Main Bearing)
(C)凸輪軸 (Camshaft)
(D)曲軸 (Crankshaft)

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統計： A(15), B(0), C(3), D(1), E(0) #2695659