短語詞組短語velocity -head correction factor 速頭改正因數(shù)velocity y head 速度頭air velocity over head 頭部風(fēng)速velocity head tachometer 液壓轉(zhuǎn)速計velocity head h 速度水頭difference of velocity head 流速水頭差Approach velocity head 漸近流速水頭;行近流速水頭velocity head graph 速度能高圖 返回 velocity head