He Mechanism of the Mold Collapse Defect for Iron Casting in Expendable Pattern Casting Process with Dry Sand and Vacuum是什么意思_He Mechanism of the Mold Collapse Defect for Iron Casting in Expendable Pattern Casting Process with Dry Sand and Vacuum在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句