5ISO 17636-2:2013,Non-destructive testing of welds-Radio- graphie testing-Part 2:X-and gamma-ray teehniques with digital deteetors[S].
6NB/T47013.11-2005,承压设备无损检测第11部分:X射线数字成像检测[S].
7ISO 5579:1998, Non-destructive testing-Radiographic exa- mination of metallic materials by X-and gamma rays-Basic rules[S].
8ISO 10893-7:2011 ,Non-destructive testing of steel tubes- Part 7 :Digital radiographic testing of the weld seam of welded steel tubes for the detection of imperfections[S].
