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介绍了三辊式和三螺杆式气门校正机的机械结构，分析了气门杆部、气门盘部偏歪校正的机理，讨论了机器结构、压辊形状、螺杆形状等对校正质量和效率的影响；对三螺杆式、三辊式、双螺杆式及搓板式气门校正机加以比较，阐述了它们各自的优缺点。
The mechanical structure of the three-roller and three-screw valve calibrators is introduced. The mechanism of correcting the valve rod and valve disc deflection is analyzed. The effects of the machine structure, the shape of the pressure roller and the shape of the screw on the quality and efficiency of calibration are discussed ; Three screw-type, three-roll, twin screw and wash plate valve calibration machine to be compared, described their advantages and disadvantages.