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