The surface brittleness of nickel phosphorus (Ni-P) coatings by electroless plating is investigated with the method of rigidity ball indentation together with the acoustic emission technique.是什么意思_The surface brittleness of nickel phosphorus (Ni-P) coatings by electroless plating is investigated with the method of rigidity ball indentation together with the acoustic emission technique.在线翻译_英语_读音_用法_例句