直线几何学

in-line filter

access line【通信】

toe the line

line focus tube

built-in smokemeter【环境】;in-line smokemeter【环境】

queu(e)ing theory【数】;theory of queu(e)ing【数】;waiting line theory【数】

lid with the line of weakness extending circumferentially of the container

manifolding apparatus with means for line selection