指针式

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，应选铜铝合金材质，底色为白色，上面标和刻度为黑色（不褪色），刻度分配应家提供标准。