Position by the valve stem threads are divided into clear and dark bar bar gate valve two...
按阀杆的螺纹位置划分，可分为明杆闸阀和暗杆闸阀两种。
The rounded cams touch the rock, and the stem bar between them is where you clip in. The axle bolt is the circle where they all meet.
圆形的凸轮接触岩石，两个凸轮之间的柄就是手握的地方，轮轴螺丝连接凸轮和手柄。
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