Standard input-output norms for printer ribbons require matched import-use conformity and verification by applicants.

Standard FTP input-output norms for computer printer ribbons/cartridges/cassettes prescribe alternative measurement bases for inputs used in exports-length correspondence for uninked ribbon, unit correspondence for inked ribbon loops, and net-to-net for plastic parts and preleadered cartridges-and require that imported inputs be those actually used in the exported product, with ribbon width in import and export matching and applicants accountable for demonstrating permissible input proportions.

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