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silicone tin can covers supplier

2025-08-14 07:28
2025-08-14 06:24
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    The lock stitch sewing machine needle is inserted into the needle bar, which moves up and down to create the stitch. The needle bar is connected to a mechanism that allows the needle to move in sync with the bobbin, ensuring that the two threads intersect at the right time and place to create a secure lock stitch.