A.等于轉(zhuǎn)速 B.等于轉(zhuǎn)速二倍 C.等于轉(zhuǎn)速的1/2 D.隨排量而變
A.對(duì)效率要求不高 B.氣閥比水閥敲擊輕 C.要求排氣量大 D.氣閥流過(guò)閥壓降小,且無(wú)慣性水頭和液體氣化問(wèn)題
A.90° B.120° C.180° D.0°