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