Components from sources 220 and 222 are mixed to form {TAIL ~ a mixture} 224 which is flowed into {HEAD ~ reaction chamber} 202 
Components from sources 220 and 222 are mixed to form { TAIL ~ a mixture } 224 which is flowed into { HEAD ~ reaction chamber } 202
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH