valve shaft meaning in Chinese

阀杆
气门杆
穴播阀轴

Choke valve shaft
阻气阀轴
The use of the double eccentric structure in the butterfly plate so as to the horizontal valve shaft is lifted a little distance above the pipe central line , and it makes that the area of lower half part butterfly plate is bigger than upper part
该阀采用双便心阀板，水平安装的阀轴在管道中心线上抬高一定距离，使阀板下半部分迎水面积大于上半部。