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sewing machine
Machine used to assemble two pieces of fabric by means of a series of stitches made with a needle and thread.
tension block
Parts that control the tension of the upper thread.
thread guide
Part that leads the thread toward the tension disk.
tension disk
Each of the parts between which the thread passes during threading.
tension dial
Graduated dial used to regulate the tension of the upper thread.
tension spring
Spring that keeps the upper thread between the tension disks.