Changsha Haochang Machinery (HC Enginepart) yog cov chaw tsim khoom hauv Suav teb thiab xa tawm cov piston rings hloov rau MAN B&W ob-stroke low-speed crosshead marine diesel xyaw, suav nrog MC-C thiab ME-C series. HC tsim piston rings los ntawm cov neeg siv khoom kuaj lossis kos duab, nrog txoj kab uas hla ntawm φ30 txog 800 mm - suav nrog MAN B&W qauv xws li S50MC-C (500 mm bore), S60MC-C (600 mm), S70ME-C (700 mm), thiab S80ME-C (800 mm). Txhua lub nplhaib piston yog tsim los rau OE specifications raws li ISO 9001: 2015 zoo system. Cov cav no ua lub luag haujlwm tseem ceeb ntawm cov nkoj loj, cov nqa khoom loj, thiab cov tsheb thauj khoom.