open ratio

open ratio

1. отношение при открытии плашек противовыбросовых превенторов (показывает отношение площади приводного поршня к площади плашки, на которую действует давление скважины в случае открытия плашек)
2. скважность гидрогеологического фильтра

Большой англо-русский и русско-английский словарь. 2001.

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