Ningbo Yinzhou Xingjian Roding Manufacturing Co., Ltd. is a factory specialized in producing shock absorber piston rods, piston rods, sleeves, and eye rings for car parts. Our company has a group of advanced producing and testing equipments, for example, middle/high-frequency hardening machine, tempering dehydrogenation machine, alignment machine, high precision centerless grinding machine, CNC machine, thread-rolling machine, and surface extra finish grinding machine; thickness tester, straightener, projector, hardness tester, digital Vickers hardness tester, surface roughness measuring...