Various embodiments are described of a liquid powered dynamometric generator built into a shoe, which has {HEAD ~ at least two layers} as {TAIL ~ part} of its sole 
Various embodiments are described of a liquid powered dynamometric generator built into a shoe , which has { HEAD ~ at least two layers } as { TAIL ~ part } of its sole
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH