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How to deal with the knotting phenomenon of the straight lace front wigs and how to maintain human hair wig

The straight lace front wigs knotted reasons Everyone hair is not tested for a long time, it will become very chaotic, and even a knotted situation, The straight lace front wigs is actually the same as our live-haired hair, and does not have a consta…

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

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