Diamond Grade是什么级别Kindly quote for Perchloric acid 71 pct (GR) grade 10 MT and Diamond Grade 5 MT.Quote with Specifications, packing & lead time刚收到的外贸询盘 ,但是里面Diamond Grade 是什么级别??希望大家帮帮忙啊,谢谢大家~~谢谢谢谢~~