短语词组短語beam waist spot size 束腰光斑尺寸Beam -spot receiver 光斑接收器beam -spot 束斑laser beam flying spot scanner 激光束飛點掃描器beam spot size 束斑大小threshold beam spot 閾值光斑的Beam Spot Shape 光斑形狀beam spot broadening 束斑展寬ion beam spot 離子束斑 返回 beam spot