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The metastable propagation rate of crack is approximately a constant in a certain size range.
在一定尺寸范围内，裂纹的亚稳扩展速率近似是常数。
youdao
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Grain size had some effect on the rate of crack propagation.
晶粒尺寸大小对裂纹扩展速率也有影响。
youdao
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Grain size had some effect on the rate of crack propagation.
晶粒尺寸大小对裂纹扩展速率也有影响。
youdao