| 释义 |
〔Gunter〕English astronomer and mathematician who invented a surveying chain, quadrant, and scale and introduced the trigonometric termscosine and cotangent. 冈特，埃德蒙：(1581-1626) 英国天文学家和数学家，发明了测链，象限仪和标尺，并引进了两个三角学术语，余弦 和 余切 〔link〕Abbr. li.A unit of length used in surveying, equal to 0.01 chain, 7.92 inches, or about 20.12 centimeters.缩写 li.令：测量用长度单位，等于0.01测链，7.92英寸或约等于20.12厘米〔chainman〕Either of the two persons who hold a surveyor's measuring chain.测链员：两个持测量员用测链的人中的任一个 |