A.The profile of the valve is like a globe B.The valve seat is set into the bulbous body C.The plug or disc of the valve is made vertical to the axis of the pipe D.The valve seat is located at right side of the plug or disc
A.reduce fuel weight B.increase specific gravity C.separate fuel from lube oil D.reduce fuel viscosity
A.上電極/關/開 B.上電極/開/關 C.下電極/關/開 D.下電極/開/關
A.①③④ B.③④⑤⑥ C.①②③④ D.①③④⑥
A.齒輪泵 B.葉片泵 C.柱塞泵 D.螺桿泵
A.大管輪和二管輪 B.二管輪和三管輪 C.三管輪和二管輪 D.二管輪和大管輪
A.肋板 B.肋骨 C.橫梁 D.肘板
A.活塞環(huán)的搭口間隙與平面間隙 B.曲軸臂距差 C.活塞與汽缸套之間的間隙 D.氣缸套活塞磨損
A.轉速自動降低穩(wěn)定工作 B.增大循環(huán)供油量后轉速稍有下降穩(wěn)定工作 C.增大循環(huán)供油量后轉速稍有上升穩(wěn)定工作 D.轉速自動降低至停車