The paper introduces the comparsion between the properties of the steel for mine supporting before and after queening and tempering for it, and describes its bending test and service conditions.是什么意思_The paper introduces the comparsion between the properties of the steel for mine supporting before and after queening and tempering for it, and describes its bending test and service conditions.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句