Aperature definitions

Aperature

1) The opening in pipes
Found on https://www.crosswordclues.com/clue/aperature

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Aperature

An opening; in solar collectors, the area through which solar radiation is admitted and directed to the absorber.
Found on http://www.electromn.com/glossary/a.htm

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Aperature

The opening in pipes.
Found on http://www.encyclo.co.uk/local/20933

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