秦工生产的GIQ型气动高真空蝶阀是通过电磁换向阀改变气路方向，控制执行气缸驱动蝶阀作启闭运动。

GIQ pneumatic high vacuum butterfly valve uses solenoid directional valve to change the direction of air passage, and controls the actuating cylinder to drive the butterfly valve opened and closed.

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题海战术则是学习高数的另一法则。秦夏说：“做练习提一方面可以巩固课堂知识，另一面可以帮助你备考。”

Another part of studying is doing a lot of exercises. "Doing exercises helps in consolidating the knowledge taught in classes and preparing for the exam, " Qin says.

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