| 摘要 |
FIELD: machine building.SUBSTANCE: pipeline comprises wave ledges 4 and wave recesses 5. Wave ledges 4 have forward front 6 and rear front 7. Forward front 6 is a bit more sloped than rear front 7 while wave ledge top 7 and wave recess 5 are flat.EFFECT: smaller losses in pipeline due to invariable flow direction.7 cl, 1 dwg |
