ASTM E592-15
鋼板射線照相法獲得的ASTM等效孔徑靈敏度的標準指南<6> >> 2分(6?51毫米)厚X-光線和1至6英寸(25至152毫米)厚度與鈷 - 60
Standard Guide to Obtainable ASTM Equivalent Penetrameter Sensitivity for Radiography of Steel Plates 14 to 2 in. (6 to 51 mm) Thick with X-Rays and 1 to 6 in. (25 to 152 mm) Thick with Cobalt-60