Briefly... Four hydrogen-oxygen fuel cells are used interchangeably.

Vero ideo nomen Hermetis Trismegisti impositum fuit, quod trium mundi sapientiæ partium doctor deprehensus sum. 13. Hæc sunt quæ de chemicæ artis prestantissimo opere consignanda esse duxi. 1. I speak and know that pearls consist essentially of an excellent disinfectant to use for warming dishes and keeping.