After-sales repair
To build a century-old brand and the most reliable sewing brand in the world
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上扣推杆调节
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上扣轨道调节
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Add-on buckle test
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9828
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Knife assembly and thread-cutting bracket adjustment
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Optical Eye Alarm Adjustment Plan 2
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The light indicator is on, but the wire cannot be cut.
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Optical eye adapts and adjusts to various fabrics.
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Emergency Plan for Optic Nerve Damage
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Unbreakable thread handling
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Thread length adjustment
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Presser foot height adjustment
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