Uses equipment such as Plug gauges, ring gauges, digital and standard clocks, Micrometers (standard and special) shadowgraph, microscope and deflection testing equipment, color and visual standard.

• 使用如下设备:塞规、环规、数字钟和标准钟、测微计(标准测微计和特殊测微计)逆光摄影机、显微镜和偏移试验设备,颜色和外观标准。