英语词汇“focal ratio”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	focal ratio
释义	focal ratio noun photog another name for f-number Words nearby focal ratio focal length, focal necrosis, focal plane, focal-plane shutter, focal point, focal ratio, focal reaction, focal segmental glomerulosclerosis, focal seizure, focal seizure disorder, Foch Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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focal ratio