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How to deal with the knotting phenomenon of the mayvenn wigs and how to maintain human hair wig

The mayvenn wigs knotted reasons Everyone hair is not tested for a long time, it will become very chaotic, and even a knotted situation, The mayvenn wigs is actually the same as our live-haired hair, and does not have a constant nutrition supply like…

Precautions for the use of the 29415 bearing and how to maintain the bearing to extend its service life

How to judge the 29415 bearing failure A sound meter is used to check the size and sound quality of the rolling sound of the 29415 bearing in operation. Even if the bearing is slightly damaged such as peeling, abnormal and irregular sounds will be em…