单词 | cosec |
例句 | If b, c be the level and collimation errors, the correction to the circle reading is b cot z � c cosec z, b being positive when the west end of the axis is high. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z |
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