... , electronic copper tape, battery, electronic alloy material, etc.(2) Nitrogen plant for food protectionTechnical indexes: Model NoPGPNFlow50-2000Nm3/hPurity99-99.9 ... and other foodstuff fresh keeping, foodstuff's traffic.(3)Nitrogen Plant for Coal mineTechnical indexes: Model NoKG(Y)ZDDTFlow200-1200Nm3/h100 ... medical gas transport.2. Biological technology, intermediate, etc. PSA nitrogen plant