I-Ningbo Zhongli Bolts Manufacturing Co., Ltd. eyasungulwa ngo-2003, ingumkhiqizi ochwepheshe wezinsimbi eziqinile ezichazwe ngokucacile ezihlukahlukene zamamodeli ahlukahlukene, ahlanganisa indawo engaba ngamamitha-skwele angu-10,000, inhlokodolobha ebhalisiwe ye-1500,000 RMB, inani lokukhiqiza lonyaka lamathani ayi-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 nezinhlobonhlobo zemishini eshisa izikhotha yeziteshi eziningi ebandayo neshisayo, ukuze ikunikeze ngemikhiqizo ethembekile nesezingeni eliphezulu.Imikhiqizo yethu eyinhloko Izinsimbi zohlobo lwe-ZYL zihlanganisa amabhawodi e-hex esakhiwo se-ASTM A325 uhlobo. 1, A490, amabhawodi ekhanda le-hex DIN931, DIN933, EN14399, DIN6914