High-speed multi-needle quilting machine, the bobbin is made of high-quality alloy steel by special heat treatment process, the hardness itself is higher than the ordinary bobbin, better toughness; and the surface is also plated with hard chrome, to ensure that the bobbin will not be deformed in the long term high-speed work; bobbin thickness of 4.7mm, the diameter of the positioning pin 3.5.
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