The air hole,inclusion and crack of cast steel surface can be repaired by suitable repair welding technology to get low stress,non-crackle effect.是什么意思_The air hole,inclusion and crack of cast steel surface can be repaired by suitable repair welding technology to get low stress,non-crackle effect.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句