Science: Insulation

insulation

Insulation
insulation

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COLD
ENERGY
FIRE
HEAT
HOT
INSULATOR
STOVE
SUN
TRANSFER
Y G R E N E W C R
T N N W Q Z A O A
Q R R C R B T L N
E E A U C A F D H
O R N N L D E F F
N N U U S T O V E
Y D S O B F I R E
Y N D T O H E A T
I C M E U S D R T
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