When people buy lamps, they will automatically choose energy-saving lamps, when they choose cars, they will choose environmentally friendly cars, and companies will be more inclined to energy-saving products when choosing machines...
Read MoreSimple brushing can only remove about 65% of the plaque, and the remaining 35% of the plaque is hidden in the adjacent surface of the teeth (interdental), under part of the gingival margin, and in the dead corners caused by the misalignment of the teeth. It contributes a little to cause caries and p......
Read MoreToothbrushes are distinguished by their bristles, and there are two types of toothbrushes, soft bristles and hard bristles. The bristles of soft bristles are very soft, thin and dense, while the bristles toothbrushes are just the opposite, with harder bristles. It's relatively thin, but also very sp......
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