According to {TAIL ~ the method}, the temperature within the chamber is raised to a predetermined level by energizing {HEAD ~ the heating elements} 
According to { TAIL ~ the method } , the temperature within the chamber is raised to a predetermined level by energizing { HEAD ~ the heating elements }
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD