a; Total fibers, b; Rock wool fibers, c; Chrysotile fibers.
*Processes (1= Feeding of Raw Material, 2= Milling & mixing, 3= Baking processes, 4= Drilling & beveling, 5= Cutting, 6= Grinding & finishing, 7= Total)

Figure 1: Confidence interval of airborne fiber concentration in different workstations of brake and clutch manufacturing factory.