Abstract: A coated cutting tool having excellent wear resistance and controlled brittleness is provided. An embodiment of the present disclosure provides a coated cutting tool including: a substrate; and a cutting layer disposed on the substrate, wherein: the cutting layer includes a brittleness suppressing layer and a wear-resistant layer disposed on the brittleness suppressing layer; the substrate includes a hard alloy body such as cemented carbide, cermet, ceramic, cubic boron nitride-based materials, or high-speed steel; the brittleness suppressing layer includes a first layer and a second layer disposed on the first layer; the first layer and the second layer each independently includes any one of (AlbTi1-b)X (where 0.6<b<0.8, and X is at least one selected from N, C, CN, NO, CO, and CNO) and (TicAl1-c)X (where 0.4<c?0.5, and X is at least one selected from N, C, CN, NO, CO, and CNO); and the first layer and the second layer include materials different from each other.

Abstract: Provided is a COVID-19 respiratory therapy device, including: a main body (10) defining a predetermined interior space; a container (111) provided on an upper portion of the main body (10); an inhalation nozzle (50) installed on an upper portion of the container (111); a water tank (13) installed in the container (111) and having an open top; a vapor space defined by the container (111) and the inhalation nozzle (50); a vaporizer (20) installed in the water tank (13) and evaporating water in the water tank (13); a controller (30) provided in the interior space and controlling the vaporizer (20); and a discharge hole (53) provided on an upper portion of the inhalation nozzle (50).