The present invention is also directed to {TAIL ~ a process} for manufacturing {HEAD ~ a gypsum based substrate} 
The present invention is also directed to { TAIL ~ a process } for manufacturing { HEAD ~ a gypsum based substrate }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD