Science: Insulation

insulation

Insulation
insulation

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COLD
ENERGY
FIRE
HEAT
HOT
INSULATOR
STOVE
SUN
TRANSFER
R E F S N A R T R
C H N F C D L O C
D E E E H K T I X
N A V N R A L X G
A T O K L G G B J
F T T U G N Y D F
N U S U G E J X L
X N N V S R H O T
I L F I R E R I T
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