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(A) Generating mechanism of needle bar, thread take-up lever and zigzag movements (B341 ⋅ B349 ⋅ B351 ⋅ B352) Thread takeup lever Eccentric counter weight Upper shaft Worm gear Pulley Needle bar crank rod Pattern cam Needle bar clamp Needle bar Needle bar supporter Zigzag connecting rod assembly Z finger Needle -5- Selecting cam