1. The new thing's appearance must have the running-in period.

2. The emphasis of this paper is running-in quality optimization question in the process of engine test.

3. Therefore the quantitative analysis of running-in process can be carried out by fractal dimension and multifractal spectrum of the sequence signals of the friction force.

4. Especially in engine running-in period before use, correct checking methods should be adopted to avoid the damage caused by incorrect ways.

5. The result of running-in indicates that the refitting project is feasible.

6. If the running-in stage to advance aware of abnormal temperature rise, leakage, vibration and noise, they should check stands.

7. While new hotels need a long running-in period, most of our employees have worked here for over 10 years, they are good enough to impress our guests.

8. The running-in wear mechanisms are very complicated, simultaneously accompanied by plough, adhesive, fatigue, oxidative and lubricated wear, etc.

8. try its best to collect and build good sentences.

9. The fractal theory is introduced and variations of running-in surface topography are characterized by fractal parameters in this paper.

10. The new running-in specifications of transmission, having the strengthening effect, was estimated by the results of strengthening under low amplitude load of single tooth bending of cylindrical gear.

11. A high running-in quality is based on optimized running procedure and accurate evaluating method.

12. Black oxidizing or phosphatizing processes for improving the running-in behaviour or the capability to run without lubrication have been in use for quite a long time.

13. This article studied the effect of CA6110Z-07Y diesel running-in process on bench in different running-in oil with oil monitoring technology.

14. This paper presents the application of multiwire technology in the microcomputer control system of automobile running-in test.

15. The wear process of the composite was composed of running-in and steady state wear.

16. It also expounds influences of hardness and roughness of teeth surface, lubrication, running-in before use on touch strength of gear.

17. It is shown that the fractal parameters are simple and effective to characterize the variations of surface topography during running-in process.

18. The studying means, studying method and studying achievement are universal applicable to running-in study of marine engine, automotive engine and locomotive engine.

19. Based on the L-M rule of BP neural network, a running-in model was established with fractal parameters.

20. As a key link of last process in production, the importance of diesel engine running-in on test bed has been approved owing to vital effect on the safety, reliability and lifetime.