1. Cutting a bar of w/c(tungsten carbide) into six pieces of square ones
2. Angular cutting for air holes
3. Cylindrical grinding after assembling six pieces into one hexagonal shape
4. First force-fitting the assembled six pieces into a ring part
5. Dimensional inspection for side “B” after fitting into a ring
6. Finish with secondary fitting into an outer case(not shown)

※ Various type of “B” Side
      B8 / B10 / B12 / B14
      B16 / B18 / B20 / B22
      B24 / B26 / B28 / B30