Mexico International Hardware Exhibition was founded in 1989, with an exhibition area of ​​50,000 square meters, attracting .......
The change of GFRF before and after the failure of the spring is extremely obvious. Therefore, by analyzing the change of GFRF, the fatigue failure of the spring can be effectively diagnosed. After the GFRF spectral feature data is compared with the sample spectral features in the stand.......
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