This section specifies the testing methods and testing instruments used when testing various three-side edge milling finished products. This method is not the only one. This section is applicable to the testing of three-sided edge milling cutters produced according to GB/T 6119 and three-sided edge milling cutters with inserts produced according to JB/T 7953. This section is suitable for the testing of three-sided edge milling cutters produced according to GB/T 6119 and three-sided edge milling cutters with inserts produced according to JB/T 7953.