刀口平尺一般是用来检验工件的平面,但有时可以代替千分比较仪使用,而且准确、方便。例如图1所示的检验规,它是用来检验某零件上槽和圆孔同心度的,因此它本身由肩边到圆柱边的尺寸7.08要求很严格。如果用图2 Knife flat feet are generally used to test the workpiece plane, but sometimes can replace the use of micrometer comparator, but also accurate and convenient. For example, the inspection gauge shown in Figure 1, which is used to check the concentricity of a groove and a hole in a part, is so rigid that its size from the shoulder to the side of the cylinder, 7.08, is very strict. If you use Figure 2