The dial shall be made of copper aluminum alloy, inalterable black numerals and graduation on white background. The manufacture of same will be to applicable standards.

仪表刻度盘应为机械指针式，应选用铜铝合材质，底色为白色，上面标数字和刻度为黑色（易褪色），刻度分配应采用厂家提供标准。