Precision parts made of fluoroelastomers, namely, seals in the nature of ball seals, O-rings, X-rings, four-lobed sealing rings, bonded mechanical seals, lip seals, mechanically spring energized seals, pipe seals, poppet seals, rod seals, valve seats, washers and gaskets, all of the foregoing being parts of machines

Precision parts made of fluoroelastomers, namely, seals in the nature of [ ball seals, ] O-rings [, X-rings ] and four-lobed sealing rings, [ bonded mechanical seals, lip seals, mechanically spring energized seals, pipe seals, poppet seals, rod seals, valve seats, washers and gaskets, ] all of the foregoing being parts of machines

Precision parts made of fluoroelastomers, namely, [ seals in the nature of ball seals, ] O-rings, [ V-rings, X-rings, ] four-lobed sealing rings, [ six-lobed sealing rings, bonded mechanical seals, lip seals, mechanically spring energized seals, pipe seals, poppet seals, rod seals, valve seats, washers, gaskets, and pump diaphragms, bellows, bladders for accumulators, wipers and scrapers for reciprocating rods, ] all of the foregoing being parts of machines