用途：主要适用于钮扣正反面形状相同或相近，无法通过传统的送扣机上的机械齿重心
筛选方法识别钮扣的正反面。但钮扣的正反二面颜色有较明显不同的钮扣，通过颜色识
别，保证需要的一面始终朝上。
Function：It is mainly suitable for recognize the front and back of the button having
the same or similar shape but with different color. Through color recognition, the required
side is always up.
工作压力：0.5-0.7MPa
Air Pressure：0.5-0.7MPa
工作电源：100-265VAC，50/60Hz
Power Supply: 100-265VAC，50/60Hz
