Craft® Engineering CNO nitrogen and oxygen production plant is similar to the CPO line of plant, but they have a nitrogen and oxygen generator that allows both of these gases to be produced and also for cylinders to be filled using two different ramp systems located on both sides of the workshop container. The nitrogen is used in the medical environment for cell preservation, quality control, etc. and in the industrial environment for pneumatics blowing up, quality control, explosion fighting processes, to make lead baths inert, etc.