跨距: span; spread; spacing; strid ...中心: centre; centrum; centrality; ...跨距中点: centre of span; mid span; midspan; span centre中跨距(中心跨距): central span均距中心: center of mean distance准距中心: centre of anallatism中心跨距: central span校距中心冲头: spacing center punch准距点，准距中心: anallatic center跨距: [工业] span; spread; spacing; strided distance; track◇跨距长度 length of span; 跨距中心 centre of span长跨距: long span净跨距: clear span跨距；跨度: span跨距点: ski oint; skipoint; span point跨距法: set-over method梁跨距: beam span列跨距: column span行跨距: row span中跨距: central span测距中误差: mean square error of distance measurement档距中间: mid span短源距中子: ssn视距中星仪: tachymeter-tra it; tachymeter-transit组距中点: class index; class mark组距中值: class mid value; class midvaluee
