The crankcase opening for the road draft tube was usually well shielded .
行车气流抽吸管的曲轴箱开口通常是很好地遮挡着的。
Enlarging the sectional area of surge tank obviously changes minimum pressure in draft tube.
增大调压室面积会明显改变尾水管最小压力值。
The reactor consists of one conventional draft tube and three convergence_divergence draft tubes.
反应器包含一个传统的导流筒和三段缩放型导流筒。
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