The Purpose Of This Contract Is To Define The Scope And Technical Conditions For The Supply Of Pressurized Gases (Pure Gases And Mixtures Of Gases) And Liquid Nitrogen, Necessary In The Development Of Research, Analysis And Other Work Activities On The Farms “El Encín”, “La Isla”, “La Chimenea” And In The Animal Selection And Reproduction Center Of The Community Of Madrid (Censyra), Belonging To The Madrid Institute Of Rural, Agrarian And Food Research And Development (Imidra).