最快速下降线

in-line filter

casting weight fishing line (line)

access line【通信】

idiopathic mid-line destructive disease

line focus tube

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

air line lubricator

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