The main block of a drop power station 1, wherein the first and second rotatable elements are wheels having certain and different speeds of rotation and having {HEAD ~ friction disks} as {TAIL ~ a connection} between sub systems 
as
The main block of a drop power station 1 , wherein the first and second rotatable elements are wheels having certain and different speeds of rotation and having { HEAD ~ friction disks } as { TAIL ~ a connection } between sub systems
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 HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH