Engineering students

<No value> |  | 7 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | [ | \
Heat pump

Caption: "Heat pump--One compact unit to heat homes in the winter and cool them in the summer is what these [two] mechanical engineering students are working...