The sequence diagram also has an exit gate that returns the balance variable.
序列图也有一个出囗门，返回balance变量。
Discusses the feature of balance valves, considers that balance valves should be used in place of the orifice, gate valves and stop valves in order to improve regulating function of liquid pipe.
分析了平衡阀的特点，认为为改善液体管路系统的调节功能，用平衡阀取代截流孔板、闸阀及截止阀势在必行。
Balance in the feed system is ultimately attained by adjustment of gate size.
浇注系统的平衡最终通过调整浇口的尺寸来达到。
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