... Substrate:metal,alloy,glass,ceramic 1 Feature Necklace vacuum coating machine/necklace coating plant/coating equipment for jewellery is ... etc.). jewelry industry(ear rings, finger rings, brooch, necklace).The coating is characteristic of high hardness,corrosion resistance,wear ... ×L4mW4m×L5mW5m×L7m 3 Coating Samples necklace vacuum coating machine/necklace coating plant/coating equipment for jewellery