Komatsu Hydraulic Parts,Komatsu Main Hydraulic Pump,Komatsu Hydraulic Pump Parts,Excavator Hydraulic Spare Parts JINING SHANTE SONGZHENG CONSTRUCTION MACHINERY CO.LTD , https://www.sdkomatsudozerparts.com The coordinate method introduced in this paper is suitable for measuring the arc on the sample plate (both convex and concave). It is convenient and practical for the measurement of large arc radius. For the sample shown in Figure 1, the radius of the arc is R300mm. The measurement method is: (1) ) Fix two square irons with higher precision and better surface quality on the flat plate, and correct them with squares to ensure that the M and N sides of the square iron are perpendicular, as shown in Figure 2.