This article introduces a new technology of the double end studs manufacture with line coldheading bolt production, submites a new concept to the double end flat die thread rolling.是什么意思_This article introduces a new technology of the double end studs manufacture with line coldheading bolt production, submites a new concept to the double end flat die thread rolling.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句