The load spectrum of the bolster spring is determined by means of establishing the mechanics model of bolster and spring of Zhuan 8A type bogie, and by using a known load spectrum of the bolster.是什么意思_The load spectrum of the bolster spring is determined by means of establishing the mechanics model of bolster and spring of Zhuan 8A type bogie, and by using a known load spectrum of the bolster.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句