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The sidewall is built out of four main surfaces.
侧壁是建立了四个主要的表面。
youdao
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On the other hand, it alleviates the mechanic strength of the sidewall rock.
另一方面又削弱了井壁岩石的力学强度。
youdao
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On the other hand, it alleviates the mechanic strength of the sidewall rock.
另一方面又削弱了井壁岩石的力学强度。
youdao