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Explanation: It is a comparator of a specific type. You could also translate as "comparator with dial indicator" as opposed to other types of comparators (optical, go-nogo, etc.). There is a photo of a "reloj comparador" in use at the link below. You can also check any good machine tool catalog.
Explanation: Medidor de deformación = Strain gauge. Medidor de desviación = Deviation meter.
Medidor de inclinación = Tiltmeter.
Ref. Diccionari Politécnico EN<>ES de F. Beigbeder. Espero sea de ayuda.