A radiographic inspection system includes an electron gun, a fixed anode of a dense material, and apparatus for steering an electron beam generated by the electron gun to multiple focal spots on the anode. The method also includes providing a spreader beam including a pair of support members, and connecting each support member to a corresponding one of the reel hubs. The actual and expected test outputs are serialized into XML, so that comparison and extraction of differences between actual and expected test outputs can be performed using methods for comparisons and extraction of differences between XML documents, such as XML change detection or calculation of checksums. An adhesive is selected to bond the first and second blanks together with the wire mesh layer interposed therebetween. A time period commences when a garbage collection event occurs. Passage holes connecting an engine combustion chamber and the air cleaner main body are provided on the air cleaner bottom plates; and an opening of a front surface of the air cleaner main body is inserted into intake ducts of vehicle body frames via seal members, and configured as an air introduction port.