In blocks or cylinders with an apparent density of 1.5 g/cm³ or more and an electrical resistivity of 7.0 μ.Ω.m or less with a nominal diameter of more than 350 mm
Restriction on entry into free circulation
condition:B,certificate:9009,action:29|condition:B,certificate:9010,action:29|condition:B,certificate:9017,action:26|condition:B,action:09