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> 14.03.02 - Bolts; Fasteners, bolts; Fasteners, nails; Fasteners, screws; Nails (hardware); Nuts (hardware); Rivets; Screws; Tacks, thumb; Thumbtacks

> 26.01.03 - Circles, incomplete (more than semi-circles); Incomplete circles (more than semi-circles)

the ontology on this stuff is fascinating. That's a fastener?

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