linesmann.
英 'laɪnzmən | 美 'laɪnzmən
中文n. 巡线工人；前锋；架线工，线条员；巡边员
词根词源
linesman (n.)1856, "soldier in a regiment of the line," from genitive of line (n.) + man (n.). Sports sense, in reference to umpires with specific duties in games with lines (originally tennis, also ice hockey) is from 1890.
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