If {HEAD ~ the first bar chart} for {TAIL ~ the power input} is stepped, this will be no cause for concern, in general, because uniform conditions of evaporation are less important than uniform conditions in the condensation from the vapor stream into the film 
for
If { HEAD ~ the first bar chart } for { TAIL ~ the power input } is stepped , this will be no cause for concern , in general , because uniform conditions of evaporation are less important than uniform conditions in the condensation from the vapor stream into the film
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH