According to the invention, {TAIL ~ the tank} is connected with {HEAD ~ the frame} so as to pivot 
According to the invention , { TAIL ~ the tank } is connected with { HEAD ~ the frame } so as to pivot
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH