Arc Flash Boundary (ARC) - is the distance at which an electrical arc can flash. outward, which may endanger employees working on electrical equipment. Flash Protection Boundary (FPB) - theJcalculated safe working distance from. electrical equipment which would not expose the employee to the hazards.
One advantage of freeze drying is that food preserved in this method can last longer than food preserved in virtually any other way. Freeze dried foods, if stored properly, can last for years, even decades, and taste exactly as they did the day they were bought fresh.
Freeze drying is the more important operation. commercially and is used to dry expensive foods which have delicate aromas or textures. (for example coffee, mushrooms, herbs and spices, fruit juices, meat, seafoods, vegetables and complete meals for military rations or expeditions) for which consumers.