First, {HEAD ~ an entire arrangement} of the copying machine is described briefly, and then the features of {TAIL ~ this invention}, i.e., the alerting system in detail 
First , { HEAD ~ an entire arrangement } of the copying machine is described briefly , and then the features of { TAIL ~ this invention } , i.e. , the alerting system in detail
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH