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