Thread-severing device for sewing machine
The invention provides a thread-severing device for a sewing machine, which has no use for the adjustment operation of a synchronizator even if the thread is changed, can prevent poor thread, and lighten the burthen of a user. The sewing machine has a sewing machine motor, a pedal, a sewing needle p...
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| Format: | Patent |
| Sprache: | chi ; eng |
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