preadjustable for wear or tolerance

Full Title

Measuring instruments characterised by the use of mechanical techniques > Gauges with an open yoke and opposed faces, i.e. calipers, in which the internal distance between the faces is fixed, although it may be preadjustable > of limit-gauge type, i.e. "go/no-go" (G01B3/40 takes precedence) > preadjustable for wear or tolerance