1、出发线
... line of communications 交通线；供应线 line of departure 出发线 line search 沿线侦察 ...
2、搜寻起始线
... line of delimitation 分界线 line of departure 搜寻起始线 line of discontinuity 不连续线 ...
3、攻击发起线
...line of bearing 交通线 line of communication; lines of communication {= LOC} 发起线；攻击发起线 line of departure {= LOD} ..
4、掷线
... 1.=lethal dose 致死剂量 2.=line of departure 掷线,发射线;进攻出发线;空中搜索起始线 3.=low density 低密度 ...