用优质碳素钢和合金钢制造,可耐高压和超高压,常用来输送高温高压汽、水等介质或高温高压 发布时间:2017-06-12 01:39 │ 来源:www.tikuol.com 题型:单项选择题 问题: 用优质碳素钢和合金钢制造,可耐高压和超高压,常用来输送高温高压汽、水等介质或高温高压含氢介质的管材为( )钢管。A.双面焊螺旋缝B.不锈耐酸钢无缝C.锅炉用无缝D.锅炉用高压无缝
题型:单项选择题 — How much will it cost my mother and me to go to Tianjin? — 300 yuan _______. [ ]A. in detail B. in brief C. in short D. in total 查看答案