One. The person of the industrial borescope camera can be a professional for that surfaces to be inspected. Plant suppliers, who know their machines pretty very well, generally also give the support of a visual inspection in their equipment and devices. Some borescopes arrive equipped by using a USB interface https://beauqizpd.pages10.com/how-much-you-need-to-expect-you-ll-pay-for-a-good-borescope-cylinder-inspection-67889067