反差控制紫外线防护护目镜
ultraviolet contrast-control safety goggles
钢带防护蜡
Safety Wax for Steel Strip
海岸带防护林
coastal protection forest
零防护带记录
zero guard band recording
射频防护
radio frequency protection
生态防护带
ecological protection zone
宽频带频谱分析仪
wide-band frequency spectrum analyser
wide-band spectrum analyzer