| 摘要 |
With reference to FIG. 1 , a blast gun assembly 1 of cylindrical form comprises a plurality of disc-shaped body sections 2, 3, 5 and 10, clamped together in face-to-fact contact. The body sections 2 comprise head sections and carry air/slurry mixture discharge nozzles 14. Each pair of adjacent body sections 2 is separated by a spacer section 3. Sections 2, 3 are formed with internal holes which are aligned to form internal ducts, connected to a slurry inlet 6 and an outlet 7, an air blast 8, and water rinse/air dry supplies 9. Water rinse and/or drying air is discharged from the assembly 1 by nozzles 26.
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