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Discusses the importance of the verification of the performance of co-ordinate measuring machines (CMMs), which have become of paramount importance to their users and manufacturers since the publication of...
Although the Hilger and Watts 20-inch reading theodolite has been largely suyperseded in surveying work, it is still commonly used for teaching purposes. This step-by-step guide shows how to set up and level...
Explains the principles and demonstrates the practical techniques of levelling. A Wild NKI tilting level is used for fieldwork. The principles, the booking of readings and the subsequent calculations are all...
Shows how components manufactured to high specification need accurate, well-maintained machine tools, set within specific tolerance limits. Explains how go/no-go gauges, micrometers and dial gagues may be...
High-accuracy laser-based alignment and deflection measurement: the principle of the NPL 3-point laser alignment and deflection system is explained with the use of animated diagrams. Illustrates several...
Show the use of the polar planimeter, a small mechanical device for the measurement of area.
The history of measuring time with exact precision is taken for granted - yet only a few generations ago, clocks were set locally by the sun. Now modern electronic technology allows time to be measured...
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