台阶螺丝；
Step #3 : Remove Screw From Bottom Base
第三步：从底座方向上再取下螺丝
Step #2 : Remove Screw From Base
第二步：取下拧在底座上的螺丝
The high step moves from under the adjusting screw.
高点从调节螺钉下移动。
The high step moves from under the adjusting screw.
使高点从调节螺钉下移动。
The high step moves from under the adjusting screw.
使高点从调节螺钉下移动。
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