n.橢圓度；橢圓形；卵形
Relevant operation practice has proven that with the optimalized sizing process parameters,steel tubes sized by the said mill possess decreased ovality and higher O.D.accuracy. 生產(chǎn)實(shí)踐表明，采用優(yōu)化后的定徑工藝參數(shù)，鋼管的橢圓度減小，外徑精度提高。
