英语翻译Cobalt is upgraded nearly three-fold using low-cost washing a_英语解答

英语翻译
Cobalt is upgraded nearly three-fold using low-cost washing and sizing similar to simple sand and gravel operations .

人气：438 ℃　时间：2020-10-01 08:06:12

解答

用低成本清洗和进行普通沙石(清洗)的操作能让Cobalt(这里我觉得译成"钴"不行,要用到专业知识了)效率提高三倍.