This added apparatus avoids the non homogeneous product {HEAD ~ liquid problems} which were found in {TAIL ~ certain past applications} 
This added apparatus avoids the non homogeneous product { HEAD ~ liquid problems } which were found in { TAIL ~ certain past applications }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL