Then the entire paint line is flushed out using {HEAD ~ a flushing medium}, before supplying the second paint through {TAIL ~ the paint line} 
Then the entire paint line is flushed out using { HEAD ~ a flushing medium } , before supplying the second paint through { TAIL ~ the paint line }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL