求翻译：本阀由阀体、阀盖、阀瓣、阀杆、阀杆螺母及手轮等零件组成，靠转动手轮使阀杆转动，阀杆带动阀瓣上升或下降来达到启闭的目的。是什么意思？

The valve from the valve body, valve cover, integral parts of the valve stem, stem nut and the handwheel by turning the handwheel so that stem turn, stem drive the valve to increase or decrease to achieve the purpose of opening and closing.

The valve from the valve body, valve covers, valves, valve stem, stem, such as nuts and wheel parts, rely on the hand wheel so that the valve stem valve stem turn, clapper led to increased or decreased to closing.

This valve by components and so on valve chest, valve cover, valve petal, valve lever, valve stem nut and handwheel is composed, depends on rotates the handwheel to cause the valve lever rotation, the valve lever impetus valve petal rise or the drop achieved opens goal which shuts.

The valve from valve body, valve cover, valve, valve stem, valve stem nut and parts such as hand wheel, turn hand wheel allows the stem turn, stem drive the disc up or down to achieve the purpose of opening and closing.

视镜