Butterfly valves have flow characteristics three times better than globe valves and approximately 75% of an equivalent size gate valve.
蝶阀的流体特性相当于截止阀的三倍甚至更高，相当于同样尺寸的闸阀的75%。
2
Reasonable designs of the structure parameters of PB layer and the gate-cathode geometry are obtained by numerical iteration and an equivalent current model.
文中采用数值迭代法和建立等效电流模型，对P_B层结构参数和门极-阴极几何图形尺寸进行了合理设计。
3
It was constructed that an optimal problem for gate locations of injection molds based on the introduction of the equivalent flow length concept.