The container further comprises an indicator system or {HEAD ~ means} for use with {TAIL ~ a hydrogen generator} and a catalyst system 
The container further comprises an indicator system or { HEAD ~ means } for use with { TAIL ~ a hydrogen generator } and a catalyst system
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH