{HEAD ~ means} for introducing {TAIL ~ a predetermined amount} of charge determined by a potential applied to the input portion into a portion beneath a predetermined electrode while driving an electrode on the transfer portion 
for introducing
{ HEAD ~ means } for introducing { TAIL ~ a predetermined amount } of charge determined by a potential applied to the input portion into a portion beneath a predetermined electrode while driving an electrode on the transfer portion
HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH