The results show that center segregation deteriorates the impact toughenss of center part and the parameter of welding thermal cycle has different effect on toughenss of steel.是什么意思_The results show that center segregation deteriorates the impact toughenss of center part and the parameter of welding thermal cycle has different effect on toughenss of steel.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句