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The average grain diameter as determined from a random cross section.
从材料任一横截面上测量的晶粒直径的平均值。
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For example: an average human's hair is about 25000 nanometers in diameter.
例如：平均人的头发的直径大约是25000纳米。
youdao
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For example: an average human's hair is about 25000 nanometers in diameter.
例如：平均人的头发的直径大约是25000纳米。
youdao