safetymenn.安全队员
safetyn.安全;保险
safety torch安全手电筒
safety pipet安全滴管
safety track安全声迹
safety cover防护罩
safety ratio安全比
safety crank安全曲柄
safety tongs安全钳
safety brake安全制动器,保险闸
safety drill安全钻头
safetyneedle安全别针