NOZZLE FOR PLASMA TORCH, AND REPLACEMENT COMPONENT UNIT

摘要

This nozzle includes a base end portion, a leading end portion, and an inner circumferential surface. The base end portion has a hole. The leading end portion has an injection hole. The inner circumferential surface connects the hole to the injection hole. The inner circumferential surface is provided with a recessed groove which is recessed radially outward and extends in the circumferential direction or is provided with a projection section which projects radially inward and extends in the circumferential direction.