The operating room itself contained a maze of plastic piping that twisted though the air between the heart-and-lung machine and the operating table.

NEWYORKER: The Operator

On most jet aircraft, hot air from the engines is routed through piping in the wings, tail and engine openings to heat their surfaces and prevent icing.

CNN: Airplane deicing: The how and why

The geothermal system heats and cools using piping that goes deep within the earth, where temperatures are warmer than outside air in the winter and cooler in the summer.

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