... CNC turning, milling, drilling and punchingTechnics: machining, casting, forging, welding, surface treatmentSpecifications of machining parts:1, Material: carbon steel, ... 3, Standard: according to the dimension tolerance of machining of customers’ requirement.4, Surface roughness: Ra0.8 ... , Weight: ranging from 0.50g to 10000kg6, Surface finish: polishing, oiled (rust-prevented), zinc-plated, nickel- ...