{HEAD ~ A phosphorescent liquid} is used in the bubble level indicators for {TAIL ~ low light use} 
is used for
{ HEAD ~ A phosphorescent liquid } is used in the bubble level indicators for { TAIL ~ low light use }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL