有人批评说，如金属探测器、许多闭路摄像机都不能正常工作或去监测。
There has been criticism that, like metal detectors, many closed-circuit cameras don't work or go unmonitored.
该金属探测仪主要由发射机单元和接收机单元组成。
The metal detector consists of transmitter unit and receiver unit.
基于保安问题，有关设备如CCTV、x光机、金属探测器及读卡机等等设备同时投入运作。
Due to the security purpose, the relevant equipment such as CCTV, X-ray machine, metal detector, card reader are also included for operation.
基于保安问题，有关设备如CCTV、x光机、金属探测器及读卡机等等设备同时投入运作。
Due to the security purpose, the relevant equipment such as CCTV, X-ray machine, metal detector, card reader are also included for operation.
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