Bréf definitions

Bref

1) Bat reference document
Found on https://www.crosswordclues.com/clue/bref

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BREF

BAT Reference Document.
Found on https://www.encyclo.co.uk/local/20720

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BREF

Stands for best reference and refers to best available technique documentation which is often used as a benchmark environmental performance measure
Found on https://www.steelonthenet.com/files/glossary-5.html

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