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In view of the wax oil may drop on the cake,which makes
people feel uncomforbable when people burn candles to
celebrate.We can not burn candles totally to celebrate
cause of health,so lots of candles are wasted.Based on
this two problems,”the healthful candle nail”is designed.
Ningbo University of Technology
Ningbo, China
Yifei Wang,
Ningbo University of Technology