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单词 waterhouse stop
释义 waterhouse stop
noun
Usage: usually capitalized W
Etymology: after Major J. Waterhouse, 19th century British photochemist
: any one of a set of thin metal plates that each have a round or specially shaped hole corresponding to a particular photographic lens aperture and are inserted as required into a slot in the barrel of a lens especially for use in photoengraving
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更新时间:2024/12/23 14:53:02