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High speed industrial overlock machine , high speed industrial lockstitch sewing machine .

超高速工业包缝机、高速工业平缝机。

Does factory have single needle lockstitch equipment with automatic position and undertrimmers ?

工厂有自动定位，切割功能的单针锁边机吗

Does factory have single needle lockstitch equipment with automatic backtack ?

工厂有自动倒针的单针锁边机吗