The latest evaluated design data from Engineering Sciences Data Unit.... Can you afford not to use them? Engineering Sciences Data Unit (ESDU) is a unique organisation that provides authoritative evaluated data for designers working in aeronautical, chemical, mechanical, structural and other engineering fields. These data are produced as Data Items, each of which is the result of a critical evaluation of the world's foremost source data and is presented in graphical and tabular hard copy

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... Data Items are concise, easy to use (through worked examples) and, above all, highly accurate and reliable.