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Angle(α): 20'
H: 10mm
Accuracy: ±2"
To inspect protractor, taper gage, index plate, index head and goniometer, can also be used to set angle
Made of special alloy steel, hardness HRC64, high stability, wear resistance and easy combination
Can be combined to any angle with interval 6 seconds after combination (6 ", 12", 18 ", ..., 360°)
