piston ring
51ring, pinned — See piston ring, pinned …
52ring ridge — See piston ring ridge …
53ring side clearance — See piston ring side clearance …
54ring stop — See piston ring stop …
55ring — 1 /rIN/ noun 1 JEWELLERY (C) a piece of jewellery that you wear on your finger: a diamond ring (=decorated with diamonds) see also: engagement ring, wedding ring 2 CIRCLE (C) a) a circular line or mark: Martha had dark rings round her eyes from… …
56piston head — That portion of the piston above the top ring. See piston dome piston crown …
57piston land — That portion of the piston which is between the ring grooves …
58piston lands — That portion of the piston which is between the ring grooves …
59piston skirt — That portion of the piston below the rings and bosses. (Some engines have an oil ring in the skirt area.) …
60ring belt — The lands and rings of a piston …