... 5.Packaging: Painting black,cap, in bundle6.Application: Petroleum,smelting,foodstuff,power,papermaking,Chemicalequipment,aviation,boilerheat,exchanger,gas ,construction,etc D ... 5.Packaging: Painting black,cap, in bundle6.Application: Petroleum,smelting,foodstuff,power,papermaking,Chemicalequipment,aviation,boilerheat,exchanger,gas ,construction,etc D ...