默认情况下，decimal类型的刻度为0，这意味着DECIMAL数据类型模拟了整数类型。
By default, the scale for a DECIMAL type is 0, which means the DECIMAL data type mimics an integer type.
“满刻度”是指转换器可能达到“数字过载”之前的最大可编码模拟信号电平。
"Full scale" refers to the converter could reach the "digital overload" maximum before the encoding analog signal levels.
介绍了一种用图像处理技术实现模拟指针表指针和刻度自动对准代替人工对准的方法。
It introduces a automatic alignment method between analog pointer meter's pointer and scale to replace the artificial alignment method with image processing technology.
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