Ring-shaped
131Annulus — (or anulus), being the Latin and French for ring , is a term used to describe various ring or circle shaped objects (or openings):cite book | last = Martim de Albuquerque | first = | title = Notes and Queries | publisher = Oxford University Press …
132industrial polymers, major — Introduction chemical compounds used in the manufacture of synthetic industrial materials. In the commercial production of plastics, elastomers, man made fibres, adhesives, and surface coatings, a tremendous variety of polymers are… …
