Radiographic Inspection of Welded Joints of Large-diameter Thick-walled Pipelines Using Ir-192;
Ir-192射源的大口径厚壁管道焊口射线探伤
It is shown that the IR reflectivity of SiO 2 TiO 2 gel glass coating was very low at the wavelength of CO 2 laser (10.
6 μm)的IR反射率值仍很低。