The position of the buoys, therefore, the height of the platform is operated with {HEAD ~ the level} of {TAIL ~ the mixture} in the first tank 
of
The position of the buoys , therefore , the height of the platform is operated with { HEAD ~ the level } of { TAIL ~ the mixture } in the first tank
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH