Inspection and Repair of the Saddle Welding Beam Defect in the Lower Gas-holding Pipe of the First-stage Conversion Furnace是什么意思_Inspection and Repair of the Saddle Welding Beam Defect in the Lower Gas-holding Pipe of the First-stage Conversion Furnace在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句