According to the working features and requirements of the belt conveyor,the paper introduced the design principle and method of the tension protection device of the belt conveyor.是什么意思_According to the working features and requirements of the belt conveyor,the paper introduced the design principle and method of the tension protection device of the belt conveyor.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句