UC X ▁- ▁N uc or ▁Ste el ▁C raw ford sv ille ▁( a ▁division ▁of ▁N uc or ▁Corporation ) ▁ ▁N US U ▁- ▁Ne pt une ▁Orient ▁L ines ▁ ▁N VC X ▁- ▁Nev ada ▁C ement ▁Company ▁ ▁N VP X ▁- ▁Nev ada ▁Power ▁Company ▁ ▁N V R ▁ ▁- ▁Northern ▁Verm ont ▁Rail road ▁ ▁N V R R ▁- ▁Nap a ▁Valley ▁Rail road ▁ ▁N W ▁▁ ▁- ▁Nor folk ▁and ▁Western ▁Railway ; ▁Nor folk ▁Southern ▁ ▁N W AX ▁- ▁National ▁W ax ▁Company ; ▁B P ▁Global ▁Special ▁Product s , ▁Inc . ▁ ▁N W C X ▁- ▁North west ▁Container ▁Services , ▁Inc . ▁ ▁N W G X ▁- ▁Gor h ams ', ▁Inc . ▁ ▁N W L X ▁- ▁Nation wide ▁Lo comot ive ▁Service ▁ ▁N WP ▁ ▁- ▁North western ▁Pacific ▁Rail road ; ▁Southern ▁Pacific ▁Rail road ; ▁Union ▁Pacific ▁Rail road ▁ ▁N WR ▁ ▁- ▁Nash ville ▁and ▁Western ▁Rail road ▁ ▁N WR X ▁- ▁Ni ag ara ▁and ▁Western ▁Railway ; ▁Ber gen ▁Pass a ic ▁Rail ▁ ▁N WT X ▁- ▁North ▁West ▁Tim ber , ▁Ltd . ▁ ▁N WT Z ▁- ▁N W ▁Transport ▁ ▁N W X ▁ ▁- ▁G E ▁Rail ▁Services ▁ ▁N W Z ▁ ▁- ▁Nor folk ▁Southern ▁Railway ▁ ▁N X ▁▁ ▁- ▁Math ies on ▁D ry ▁Ice ▁ ▁N X L Z ▁- ▁National ▁X press