{HEAD ~ An electrical power chord} 31 may be provided for powering {TAIL ~ the compressor} 23 directly from a separate electrical source such as an electrical outlet or battery pack or for recharging one or more of batteries 26 and 27 
provided for powering
{ HEAD ~ An electrical power chord } 31 may be provided for powering { TAIL ~ the compressor } 23 directly from a separate electrical source such as an electrical outlet or battery pack or for recharging one or more of batteries 26 and 27
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