反差控制紫外线防护护目镜
ultraviolet contrast-control safety goggles
钢结构防撞栏
steel structure anticollision railing
液—气渗透防护
liquid-vapor permeation protection
ATP(列车超速防护系统)外部实时环境
external real-time environment of ATP
Dijkstra‘s防护命令语言
Dijkstra’s guarded command language
GPS2型主动防护网
GPS2 type initiative protective net