The truck pivots on a ball thrust race (slightly preloaded) with limit stops to prevent damage to the universal joints etc in the case of a derailment.是什么意思_The truck pivots on a ball thrust race (slightly preloaded) with limit stops to prevent damage to the universal joints etc in the case of a derailment.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句