... sand; 4, silicon crystal yuan of cutting; 5, tooth die of clean sand; 6, precision foundry sand; Edit this ... artists. 4, pretreatment processing: TEFLON (TEFLON), PU, rubber, plastic coating, rubber barrels (ROLLER), electroplating, metal spray welding, plating titanium ... . 5, deckle edge processing: bakelite, plastics, zinc, aluminum die-casting products, electronic parts, core of burrs removal. 6, ...