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Air from China into the pelvic part, under the alcohol lamp heating, small porcelain basin inside air temperature, hot air to rise, as the pressure increases, the heat from porcelain pelvic floor out then rise, and big porcelain basin form a between the air flow, the heat from the big porcelain basin in the middle of the rush out, so as to realize and outside air heat exchange.
Chunlei Shi Wei Shang Tianyu Li Xudian Guan