{HEAD ~ Further object} is to provide {TAIL ~ a covered button} of the aforesaid type which can be easily assembled 
{ HEAD ~ Further object } is to provide { TAIL ~ a covered button } of the aforesaid type which can be easily assembled
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH