Mashiinnada Changsha Haochang (HC Enginepart) waa soo saaraha fadhigiisu yahay Shiinaha iyo dhoofiyaha beddelka giraangiraha piston ee MAN B&W laba-stroke-xawaaraha hooseeya ee matoorada naaftada badda, oo ay ku jiraan taxanaha MC-C iyo ME-C. HC waxay ka soo saartaa faraantiga piston ee muunada macaamiisha ama sawirada, oo leh dhexroor daboolan φ30 ilaa 800 mm - oo ka kooban MAN B&W moodooyinka sida S50MC-C (500 mm bore), S60MC-C (600 mm), S70ME-C (700 mm), iyo S80ME-C (800 mm). Dhammaan giraangiraha piston waxaa loo soo saaray qeexitaannada OE ee hoos yimaada ISO 9001: 2015 nidaamka tayada. Matooradani waxay u adeegaan sida kicinta ugu muhiimsan maraakiibta weelka waaweyn, kuwa xamuulka qaada, iyo booyadaha.