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When a child is infected with respiratory tract infection, the pathogenic bacteria can easily enter the middle ear through the eustachian tube and cause otitis media. However, this type of acute otitis media is usually seven to 10 days after a cold, so it is easy to be ignored by parents. After the symptoms of the baby's respiratory infection have gone away, parents need to be concerned about whether the baby has symptoms of otitis media. In addition, the best measure to prevent the childhood suffering from otitis is to actively prevent colds or minimize the cold cycle. When a child is infected with respiratory tract infection, the pathogenic bacteria can easily enter the middle ear through the eustachian tube and cause otitis media. However, this type of acute otitis media is usually seven to 10 days after a cold, so it is easy to be ignored by parents. After the symptoms of the baby's respiratory infection have gone away, parents need to be concerned about whether the baby has symptoms of otitis media. In addition, the best measure to prevent the childhood suffering from otitis is to actively prevent colds or minimize the cold cycle.
Off-road car tires -- cross-country cars are the front and rear wheels. Main driving cross-country car tyres in bad road, such as desert, muddy ground, loose soil or other no pavement road, urging tire has high performance and off-road tires tend to use low pressure, sometimes with pressure regulating tire, according to the road condition to adjust the size of the tire pressure. In order to improve the cross - cross section, it is generally used to increase the width of the tire section and rim and reduce the diameter of the rim so as to increase the grounding area and reduce the grounding pressure. The tyre structure is also used in the structure of the meridional structure
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