... 50 yearsThe standard ] : People's Republic of China GA68-2003 "cross take" standardsThe protective level ] : 24 joule kinetic energy, not dew ... each 0.3 kilograms including take cover cross)Commodity is introduced:1, cross by coat, cross the tank serve two parts, use ... corrosion, high temperature coat avoid washing;5, the cross to comply with relevant standards service, cross area of more than 0.3 ...