It is suited to control media by being full opened or closed in pipelines and devices. Its disc is driven by stem, which lift along the seat axis.

本产品适用于全开全闭的各类管道及设备上的启闭件，由阀杆带动，沿阀座轴线作升降运动的阀门。

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It is found that the Angle between tumble axis and horizontal plane increases with valve lift. The "tumble" is not a pure tumble, but is a inclined swirl.

用热线风速仪研究了缸内滚流的形成过程，发现滚流轴线与水平面的夹角随气门升程的增大而增大。

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Then kinematics and dynamics of lift-drag-type vertical axis wind turbine of living leaves is analyzed and mathematical model is established.

然后对升阻型垂直轴活叶风力机进行运动学分析和动力学分析，建立了数学模型。

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