The temperature within the kiln is raised to {HEAD ~ a level} by energizing {TAIL ~ the heating elements} 
The temperature within the kiln is raised to { HEAD ~ a level } by energizing { TAIL ~ the heating elements }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL