{HEAD ~ Glass}, alcohol and a small amount of water are placed in a ball mill, and mixed and ground therein for {TAIL ~ about 20 hours} to give an average glass particle diameter of about 1 5 μm 
are ground for
{ HEAD ~ Glass } , alcohol and a small amount of water are placed in a ball mill , and mixed and ground therein for { TAIL ~ about 20 hours } to give an average glass particle diameter of about 1 5 μm
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL OTH OTH OTH OTH OTH OTH OTH OTH OTH REL OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH