| 摘要 |
PURPOSE: A nozzle device and cutting steel piece including the same are provided to prevent leak of gas including air or fuel by enhancing cohesion of nozzle. CONSTITUTION: A nozzle device comprises a first nozzle(140) and a second nozzle(150). The first nozzle is equipped to end portion of a burner and shields scattering of molten metal dissolved by the burner. The second nozzle is connected to the burner(112) through intermediation of first nozzle. A mounting unit(114) which is connected to the first nozzle is provided in the inner circumference of the burner end. The first nozzle comprises a first nozzle main body(142) and a first nozzle head(146). |
