cast iron pipe短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 生铁管 The temperature distribution has two peaks. The first peak is due to solidification shrinkage, and the second peak is related to the graphitizing expansion during solidification of cast iron pipe. 温度分布有两个峰值,第一个位于液面附近,温度最高,是由于凝固收缩造成; cnki