标题: API 20B-2013 Open Die Shaped Forgings for Use in the Petroleum and Natural Gas I [打印本页] 作者: liuxilin1215 时间: 2015-3-5 11:33:03 标题: API 20B-2013 Open Die Shaped Forgings for Use in the Petroleum and Natural Gas I
API 20B-2013 Open Die Shaped Forgings for Use in the Petroleum and Natural Gas Industry