1) Book about petroleum politics 2) Like some potential 3) Not drawn upon or used 4) Not subjected to tapping 5) Not utilized 6) Not yet exploited or used 7) Not yet utilized 8) Potential 9) Yet to be exploited 10) Yet to be used 1) Latent 2) New 3) Unexploited 
[adj] - not subjected to tapping 2. [adj] - not drawn upon or used
adjective not subjected to tapping; `an untapped keg`; `an untapped sugar maple`
The alternative choice to Tapped Rack Rail. As described under CLIP NUTS previously, untapped rack rail has EIA standard spaced 1/4' holes which employ a specialized clip nut. The advantages of Untapped Rack Rail over Tapped is the ease of dealing with stripped threads. One simply needs to replace a clip, not an entire rail.