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