Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
배가스연소탑은 공장에서 발생하는 가스를 태우기 위해 사용됩니다.baegaseyeonsotapeun gongjangeseo balseonghaneun gaseureul taewugi wihae sayongdoemnida.The flare stack is used to burn gases generated in the factory.