The pivotable connection between frame and tank is preferably designed in such a way that pivoting of {HEAD ~ the tank} is about {TAIL ~ a horizontal axis} 
is about
The pivotable connection between frame and tank is preferably designed in such a way that pivoting of { HEAD ~ the tank } is about { TAIL ~ a horizontal axis }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL