Although the water transport unit 900 is shown as a pair of generally rectangular film like {TAIL ~ channels} 910 and 920 with membrane 930 and diffusion media 940, it will be appreciated that the channels, membrane and diffusion media may be any of {HEAD ~ a variety} of shapes 
Although the water transport unit 900 is shown as a pair of generally rectangular film like { TAIL ~ channels } 910 and 920 with membrane 930 and diffusion media 940 , it will be appreciated that the channels , membrane and diffusion media may be any of { HEAD ~ a variety } of shapes
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