【摘要】 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。若采用钢管做突沿会使其工艺精度超过现有技术水平。更多还原

【Abstract】 The construction of a track and field sports ground requires the most accuracy of the circumferential instalment of track kerbs. The technology, accuracy and function of the eonstruction will achieve a higher level than the level of the present technical requirement if steel tubes are to be used as track kerbs.更多还原