低喷丸强度试件表面微裂纹大量萌生，密度非常高。
Crack initiation life is much longer than those of low shot peening pressure.
结果表明，原材料存在浅表面微裂纹、夹杂气孔等冶金缺陷是导致裂纹产生的主要原因。
The result indicates that the surface light crackle and inclusion air hole est. metallurgy shortcomings are the main reason of causing crackle.
玻璃本身是一种高强度材料，由于受表面微裂纹的影响，玻璃的实际强度仅仅是其理论强度的几百分之一。
Glass is a kind of high-strength inorganic non-metallic material, but because of the micro-crack in the surface, glass actual strength is less one - percent of its theoretical strength.
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