 Ṣẹda ẹya ti o nira sii ti gbolohun yii Oruka irin jẹ orukọ ti o gbajumo fun aabo ati iṣakoso iṣakoso ti o ni awọn ọgọọgọrun awọn kamẹra CCTV ti o yika Ilu Ilu London, agbegbe owo ni okan ti Greater London. : Òtítọ ni pé, àdàkọ tí ó díjú jùlọ nínú gbólóhùn náà ni The ring of steel is the popular name for the security and surveillance cordon consisting of a few hundred CCTV cameras surrounding the City of London, installed in the 1990s to deter the Provisional IRA and other threats. 