Because nozzle shape with oblique cut models is asymmetric, the disturbance produced at the exit of nozzle is reflected on the longer side and causes shock waves in the inner flow.

This paper briefly introduces the concept of oblique cut in economical LOM for metal part, mainly researches on material, structure and parameters of special oblique milling cutter.

The bottom of the disc is made of knife-shaped gate with a cut off function of the medium. When gate is closed, oblique plane of gate valve encounters wedge block of gate to achieve sealing effect.