Control of good condition of all the items, equally concerning its manufacture, working order or maintenance, is carried out by means of non-destructive trials. These tests are of two fundamental varieties which are welding and magnetoscopy. Thus the correct manufacture is controlled and also any possible subsequent defects are detected.
The maintenance of railway rolling stock is by means of a permanent system of controls, in which the two previously mentioned methods are combined.
The carrying out of these tests in extremely simple and their verification can be entrusted to any worker with minimal technical knowledge in this field.
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