protective gas保护气体protectiveadj.保护的；防卫的Protective stake at grade crossing道口护桩protective homogenization technique保护性均化技术protective clothing for coal miners煤矿用防护服Protective grounding of power lines电力线的保护接地protective area of subaqueous cable水底电缆保护区protective varnish for construction结构防护漆PROTECTIVE ELEMENT AND BATTERY PACK保护元件及电池组Protective lung ventilation strategy保护性肺通气策略Protective helmets for bicycle users自行车安全帽protective coating for the radiation[化] 防辐射线涂料

1. The fuse box suddenly gave off a discharge.
   熔线盒突然放电。