... and ice boxKey processTube bending ,Punching the fins,Tube expanding,Degreasing,Welding and assembling,Leakage test,Drying,Inspection ... requirements for refrigeratorCapacity500 thousand sets per yearCooling System Tube Inside Standards Pipeline volume,cm3≤100101~200201~400401~ ... 800Residual moisture,mg≤10≤20≤25≤30Residual impurity≤100mg/m2Biggest single ...