Be prepared against war, be prepared against natural disasters, and do everything for the people.
《新英汉大辞典》
3
介绍了一种新的奥氏体不锈钢无缝管材制备工艺,即对空心铸坯直接热挤压制备荒管。
A new processing technique for seamless tubes manufacture of austenitic stainless steel is introduced, in which hollow cast blank is directly used for hot extrusion.