A fuel cell adopting the liquid tank maintains the liquid level in the tank near {HEAD ~ 50%} of {TAIL ~ the full level} even when the fuel cell is rotated 
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A fuel cell adopting the liquid tank maintains the liquid level in the tank near { HEAD ~ 50 % } of { TAIL ~ the full level } even when the fuel cell is rotated
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 TAIL OTH OTH OTH OTH OTH OTH OTH