... /T 4082-2000, GB/T4162-2008,the relevant national standards 2) Water film in steel pipes / steel bars ... /T 4082-2000, GB/T4162-2008,the relevant national standards 3) Rotating water chamber in steel pipes / steel bars ... or exceed thestandardsofGB, line standard, enterprise standard, ISO standards, ASTM standards, EN standards 4) Wheel,hub and ringultrasonic testing equipmentEquipment introduction After ...