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This is a special "window", which can balance
the temperature difference between indoor and
outdoor, display the change of temperature and
humidity, and also has the function of sound.
The products mainly serve the swallow house
of swiftlet to balance the indoor temperature.The
source of the design is based on the event of
wanghong selling fake bird's nest. Later,we have
a further understanding of how bird's nest is pro-
duced. According to the nature of bird's nest that
JinSiYan chooses and the necessary conditions