ʻO Changsha Haochang Machinery (HC Enginepart) he mea hana ma Kina a me ka mea hoʻopuka i nā apo piston pani no MAN B&W ʻelua-stroke low-speed crosshead marine diesel engine, me ka MC-C a me ME-C series. Hoʻokumu ʻo HC i nā apo piston mai nā laʻana a i ʻole kiʻi kiʻi, me ka uhi ʻana o ke anawaena mai φ30 a 800 mm - e hoʻopili ana i nā hiʻohiʻona MAN B&W e like me ka S50MC-C (500 mm bore), S60MC-C (600 mm), S70ME-C (700 mm), a me S80ME-C (800 mm). Hoʻokumu ʻia nā apo piston āpau i nā kikoʻī OE ma lalo o ka ʻōnaehana maikaʻi ISO 9001: 2015. ʻO kēia mau ʻenekini ka mea hoʻoikaika nui ma nā moku pahu nui, nā mea lawe nui, a me nā pahu pahu.