I-Ningbo Zhongli Bolts Manufacturing Co., Ltd. eyasungulwa ngo-2003, ingumkhiqizi ochwepheshile wezinsimbi eziqinile ngokucaciswa okuhlukene kwamamodeli ahlukahlukene, ahlanganisa indawo engaba amamitha-skwele ayi-10,000, inhlokodolobha ebhalisiwe ye-RMB eyi-1500,000, enengqikithi yokukhiqiza yonyaka eyi-8,000 ngonyaka. Le nkampani isungule amagatsha amaningana okuthengisa ezifundazweni ezahlukene eChina. Ngaleso sikhathi, imikhiqizo yenkampani ithunyelwa eYurophu, e-USA, Middle East, Africa, Southeast Asia nakwezinye izifunda. Le nkampani inekhono eliqinile lobuchwepheshe, izinto zokuhlola eziphelele kanye nezinhlobonhlobo zemishini eshisa izikhotha ebanda futhi eshisa izikhotha yeziteshi eziningi, ukuze ikunikeze ngemikhiqizo ethembekile nesezingeni eliphezulu.Imikhiqizo yethu eyinhloko Izinsimbi zohlobo lwe-ZYL zihlanganisa amabhawodi e-hex esakhiwo ASTM A325 uhlobo 1, A490, amabhawodi ekhanda le-hex DIN931, DIN1639, DIN1639, DIN1639, DIN9319, DIN9319,