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