短語詞組短語Velocity measure of flow 流場測速velocity hearticle of flow 流速水頭velocity hed of flow 流速水頭velocity field of flow 流場velocity head of flow 流速水頭subcritical velocity of flow 亞臨界臨permissible velocity of flow 允許流速velocity of flow adjust 流速調(diào)節(jié)velocity of flow field 流速場 返回 velocity of flow