An upsetting die has been designed to form the hemi-spherical ends of a series of bracings by hot upsetting on a general stamping machine.是什么意思_An upsetting die has been designed to form the hemi-spherical ends of a series of bracings by hot upsetting on a general stamping machine.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句