Water cooled lance and lance manipulator have both replaced the hand lance.The lance manipulator is an efficient and economical tool to inject oxygen and solid materials into EAF.是什么意思_Water cooled lance and lance manipulator have both replaced the hand lance.The lance manipulator is an efficient and economical tool to inject oxygen and solid materials into EAF.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句