The off-centre knob causes the internal mirrors to angle inward or outward depending on how far apart the centres are on the stereo image one is viewing.
根据所观看的立体图对的中心距离，离心旋钮让内部镜子向内偏或是向外偏。
2
When in use, the knob is loosened to regulate the cantilevers to a best Angle that is suitable for the clothes for air-curing and the knob is screwed up to fix the Angle.