Slope excavation will influence the original stress field inside the natural slope.
边坡开挖会影响自然斜坡内部应力场的原始状态。
The original audio recording playback machine was at least the length of a football field.
原来的录音播放机是在至少一个足球场的长度。
The original audio recording playback machine was at least the length of a football field.
原来的录音播放机是在至少一个足球场的长度。
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