保安的英語翻譯：

ensure public security

電源的英語翻譯：

electrical source; power source; power supply
【計】 power source; power supply; PS; supply power
【化】 current source; electric source; power source; power supply
supply source

裝置的英語翻譯：

device; apparatus; fitting; installation; setting; unit
【計】 blaster; U
【化】 equipment; set; set up; setting
【醫(yī)】 apparatus; device; fitting; installation; mounting; unit
【經(jīng)】 equipment; installation