line-of-sight boundary视线: sight line; line of sight; o ...距离: distance; range; gap; space; ...界限: demarcation line; dividing l ...视线距离: line-of-sight distance; optical range; sighting distance无线电视线距离: radio optical line of distance; radio optical range下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:视线距离界限，即可在微信中查询翻译
