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