The microstructure of weld metal for MAW is blocky ferrite and a little pearlite, the microstructure in the heat-affected zone is new type bainite.是什么意思_The microstructure of weld metal for MAW is blocky ferrite and a little pearlite, the microstructure in the heat-affected zone is new type bainite.在线翻译_英语_读音_用法_例句