The use of the refrigerant potential of cryogenic fluids is now in its infancy. The high driving force — the low temperature boiling point — has over the years many times intrigued scientists and engineers to consider its utilization for many situations. On the lab bench, it was successful; but in most commercial applications its cost far over-shadowed its ease of handling, its speed of freezing, its flexibility, its seemingly limitless capacity, and its 100% reliability.

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