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Milk powder is reference to human milk components, the use of modern technology, will be a thorough reformation milk, in order to better suited to cannot eat the breast milk baby's physiological characteristics and nutritional requirements, make it close to breast milk, nutritional not comparable to breast milk, baby bottles, pacifiers unsanitary, powdered milk expired or have quality problems, the temperature of the water is not enough, deterioration, or brewing time is too long, may contain bugs, to the baby health adversely.
Early pneumatic tyre, use is made of coated with rubber canvas when tire body, because the canvas ordinate and horizontal lines cross each other, due to the deformation of the tire when walking, lead to rub against each other, in this way, the line is easy to be ground breaking, the tires can only run 200-300 km. In 1903, Mr. J. f. palmer invented the twill textile, which led to the development of cross - layer tires, making the tyre life a big step forward. Because the tire of the skew fork will no longer cause friction because of the tread of the tyre, the cord will not be easily worn out, so the life span will be considerably longer. In 1930, Michelin made the first tyre without a tyre. The world famous meridian tire was invented in 1946. Therefore, the development of the tire has been a long journey, in this long night, I do not know how many generations have paid hard labor and excellent wisdom
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