当鼠标指针在屏幕上移动时，感应针的升降状态则代表指针所在位置的文字。
As the cursor controlled by the mouse is moved across the screen, the pins rise and fall to represent the text across which they are moving.
可用一滑动控制块把滑动件相对针背升降到各钩尖端位置上。
To raise and lower the slide to the various positions of the hook tips relative to the needle back, a sliding control block may be provided.
通过针阀杆的旋转即可以关闭针阀 又可以带动清油器升降，清除喷嘴中的积碳。
The needle valve can be closed through the rotation of a needle stem, and the oil cleaning device can also be driven to lift to clean out carbon deposit in the nozzle.
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