Non-numerically controlled punching, notching, and combined punching-and-shearing machines occupy a distinct classification niche from their CNC counterparts, making the control-type distinction critical at the time of entry. These machines are workhorses in sheet-metal fabrication, HVAC ductwork production, and structural steel processing, where mechanical or hydraulic actuation is preferred over programmable control. Importers should verify whether a machine incorporates any NC functionality, as misclassification between NC and non-NC headings is a common audit trigger for metalworking equipment.

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