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
벤투리관은 유체의 속도를 증가시키는 데 사용됩니다.benturi-gwan-eun yuchae-ui sokdo-reul jeungsahikineun de sayongdoemnida.The Venturi tube is used to increase the speed of the fluid.