短语词组短語ore e grade 鑛石品級ore removal grade 出窿品位ore -grade precipitate 鑛石級沉澱物Unleachable ore -grade 難浸鑛品位ore feed grade 入選品位ore operating grade 鑛石作業品位ore slurry grade 鑛漿品位iron ore slurry grade 鉄鑛漿品位mining ore grade 採鑛等級 返回 ore grade