| http://www.w3.org/ns/prov#value | - Also, the photographic apparatus is controllable from the weld sensing device 33, the magnetic detector device 34 and the ultrasonic inspection apparatus 12 in a manner such as to restrict the operation of the photographic apparatus to areas in the vicinity of welds, to areas in which defects are magnetically detected and areas in which corrosion pits are detected by the ultrasonic apparatus 12.
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