21. In the above figure there are two rings of moving blades separated by a single of ring of fixed blades . 22. The steam coming from the boiler is passed to the first ring of fixed blades , where it gets partially expanded. 23. The primary difference is that food processors use interchangeable blades and disks ( attachments ) rather than a fixed blade . 24. The fixed blades act as nozzles i . e . they change the direction of the steam and also expand it. 25. The steam coming from the boiler is fed to the first set of fixed blades i . e . the nozzle ring. 26. From the above figure it can be seen that the steam, after exiting from the moving blades, enters into the fixed blades . 27. This canopy also extends the full length of the East Elevation and is supported by Steel Columns and Fixed Blade Steel Sunshades. 28. With the entry of the USA into WW2 the government asked the public for donations of fixed blade knives to arm the troops. 29. Mad Dog Knives won the 1992 " SEAL Trials " to supply Naval Special Warfare Groups 1 and 2 with a fixed blade knife. 30. At the improbably named Fish Corner, one of a dozen chicken shops, a man sat cross-legged slicing off heads against a large fixed blade .