外加厚 meaning in English

eue
external upset
external-upset

Outer thickening oil tube has been applied popular in the petrol production with the problem of many product
摘要外加厚油管在国内外石油生产中应用比较广泛。
In order to decrease the cost , disabled tube has been classified in upset forging repair technology , which produces a good economical benefit
但外加厚油管加工生产中，废残品较多，为降低成本，我厂对废油管进行了分类，并采用再镦锻工艺修复，取得了良好的经济效果。