보도싱가포르 The Straits Times 의 위클린 관련 기사
https://www.sgh.com.sg/news/tomorrows-medicine/kkh-trying-out-automated-escalator-handrail-cleaning-device
https://www.sgh.com.sg/news/tomorrows-medicine/kkh-trying-out-automated-escalator-handrail-cleaning-device