beam on微笑beamvi.微笑；发光vt.播送；发射；用梁支撑n.桁条；光线；(光线的)束；(横)梁beam of bridge crane岩壁吊车梁beam and girder slab交梁平板beam deviation scale航道偏离刻度beam scanning method射束扫描法beam analyzed theory光线分析理论beam modulation disc电子束调制盘beam condensing unit聚光装置beam-indexing tube电子束引示显像管beam tape technology梁式引线带组装技术beam -pumping unit抽油机