... polyester, high-durability polyester, polyvinylidene fluoride, epoxy and high corrosion-resisting coating are widely used for building ... door plate of refrigerators, and shell of DVDs, air conditionings, freezers, and washing machines.Number and Standard: No., standard, ... use, mechanical seaming, deep punching, and ultra-deep punching. Coating and welding performances of alloying hot galvanizing ...