Generally {HEAD ~ the concentrate} may be entrained in a product or introduced directly into {TAIL ~ the environment} of use 
introduced directly into
Generally { HEAD ~ the concentrate } may be entrained in a product or introduced directly into { TAIL ~ the environment } of use
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH