... Main products: fasteners: bolts, nuts, washers; CNC machining precision parts: valve accessory, brass tube fittings, elbow, tee, nut; ... Auto-lathe turning precision part: precision electronic parts, and other jeweler accessories.(3) Main equipments: CNC lathe ... devices: digital projector, Rockwell hardness tester, hydraulic valve test bench, micrometer, thread ring gauge and plug gauge and other ...