1. Indication poor: watch any moment of the moment of instruction and standard time difference. 2. Dusk: the watch is separated from the day for the difference between the actual instructions. 3. Instantaneous daily difference: In a short period of time and the provisions of the environmental conditions, the measured value measured with the test instrument. 4 average daily difference: refers to the average number of days watch the difference. 5. Japan deviation: refers to the difference between the average daily difference and the difference. 6. Average daily deviation: refers to the average number of days deviations watch the day. 7. Degradation: refers to the difference between the two adjacent days of the difference. 8. Average daily variation: refers to the average daily variation in a number of days. 9. Isochronous: refers to the watch full of articles and after 24 hours, the corresponding position of the instantaneous difference between the difference. Usually take the maximum difference is equal time difference. 10.Difference: When the watch full of all positions measured instantaneous difference between the maximum difference. 11. Swing: The angular displacement of the balance wheel from one extreme position to another extreme position. 12. Full swing Swing: the watch full, the surface and the elevation of the difference between the maximum position. 13. Half Full Swing Poor: The difference between the watch full bar and the swath position on the 24-hour watch. 14. Half swing: refers to the watch after the full 24 hours after the "3" on the swing position. 15. Temperature Coefficient: Watt-hour change in temperature for each change of 1 ℃ value. 16. Composite Index: Is to reflect the internal quality of the overall parameters of the table, from the time difference, bit error, the temperature coefficient by a certain percentage of the value of the combination. 17. Poor recovery: refers to the difference between the daily difference of the last day during a certain inspection period and the same position at the beginning of the test. 18. Continuation of travel time: refers to a watch full winding time can be maintained after the time. 19. Cycle: refers to the watch speed regulator body in a full oscillation process of the time. 20. Frequency: The frequency of the mechanical watch refers to the total number of oscillations per second of the balance. The unit is Hertz (Hz). In practice, the corresponding number of wobbles (times / second) or (number of beats / hour) can also be used to represent. Hertz times / second time / hour 5/2518000 11/411/219800 3621600 7/2725200 4828800 51036000