The outer ring should not show pitting spots, mottles, notches, corrosion, and grinding defects, and the surface of the inner hole should not show oxide scale, corrosion, and foreign matters.是什么意思_The outer ring should not show pitting spots, mottles, notches, corrosion, and grinding defects, and the surface of the inner hole should not show oxide scale, corrosion, and foreign matters.在线翻译_英语_读音_用法_例句