Apparatus 1, wherein the device is provided with {HEAD ~ means} which follows {TAIL ~ its rotation} and is capable of shearing the vitrifiable material 
follows
Apparatus 1 , wherein the device is provided with { HEAD ~ means } which follows { TAIL ~ its rotation } and is capable of shearing the vitrifiable material
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH