The answer is the "refrigeration technique" that you alluded to.

He was a forerunner in refrigeration techniques, and some of his methods are still being used with bananas.

He pioneered refrigeration techniques and used these to explore how materials behave when cooled to nearly absolute zero.

Zamboni created a plant for making ice blocks that could be used in refrigeration techniques.

Having a scientific frame of mind, he embarked on an extensive process of research and experiments in refrigeration techniques for large shipping vessels.

This effect is currently being explored to produce better refrigeration techniques, especially for use in spacecraft.

The decision to invest in Brazil was based on several factors, including cheap land and labor and advanced refrigeration techniques.

In 1875, to mark his achievements in the refrigeration techniques, Mort arranged a picnic for 300 guests.

This evaporation pulls energy from the overall system, which can be pumped out in a way completely analogous to normal refrigeration techniques.

This simple refrigeration technique prevented food for the return trip that would spend several hours inside a small, confined space from going off.