The second is to use hot air to heat press the head of the cleaning cotton swab. This is also the manufacturing process of our cleaning cotton swabs. Because hot air can not only blow off some of the original dust on the cotton swab, but the head of the cotton swab and the handle of the cotton swab are more closely integrated and have a longer service life. The third type is produced using ultrasonic waves. As for how it is produced, I suggest you look up relevant information. Although the quality of cotton swabs produced using ultrasonic waves is the best, the cost is not low, so most buyers will not consider it.
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