The shaft also shall have a directionalindicator on top to indicate disc position when the handle is removed.
阀杆也应该在顶部配置方向指示器，用于当手柄拆卸下来时指示阀瓣的位置。
2
The directional arrows on the outside floor indicator are unique.
机外楼层显示器的方向箭咀显得独特。
3
The floor indicator used to be the same as the other lifts in the complex. But it was modified to this one with scrolling directional arrows in recent years.