The Si-Mn steel track plate and pin usually exist the early abrasion,one of the main reasons is the burr defect of pin hole.是什么意思_The Si-Mn steel track plate and pin usually exist the early abrasion,one of the main reasons is the burr defect of pin hole.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句