The construction of a track and field sports ground requires the most accuracy of the circumferential instalment of track kerbs.
在田径运动场的施工中，要求跑道内突沿的周长达到最佳精确度。
The construction of a track and field sports ground requires the most accuracy of the circumferential instalment of track kerbs.
在田径运动场的施工中，要求跑道内突沿的周长达到最佳精确度。
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