34. 下列何種泵系統上不須安裝釋壓閥( Relief Valve)？(A) 燃油齒輪泵(Gear Pump)(B) 滑油螺旋泵浦(Screw Pump)(C) 離心式泵浦(Centrifugal Pump)(D) 舵機液壓油泵系統(Hydraulic oil pump system of steering gear)