However, it is particularly advantageous to employ it in a context of melting by submerged burners which tends to generate {HEAD ~ a foam} having {TAIL ~ a very high bubble content} and in a context of refining under reduced pressure, as it considerably increases its effectiveness, which is already particularly high 
having
However , it is particularly advantageous to employ it in a context of melting by submerged burners which tends to generate { HEAD ~ a foam } having { TAIL ~ a very high bubble content } and in a context of refining under reduced pressure , as it considerably increases its effectiveness , which is already particularly high
OTH 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 REL TAIL TAIL 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 OTH OTH