On July 1, 2022, fatigue tests on the new model ST-358-9970 of air spring were completed. 

This is the final step in verifying that the product can be sold. It took 2 months from project development, mold design, samples produce, and kinds of physical test to be certified as marketable products.

This product air spirng ST-358-9970 has been tested more than 6 million times of fatigue tests  without leakage. 

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