reduction in grade的意思|示意

Its macro-level impact is likely to be minimal—especially as it was accompanied by a reduction in the rebates available for other, polluting products like high-grade zinc and some types of battery.

其在宏观方面的影响可能是微乎其微，特别是因为减少退税也有利于其他污染产业，如高含锌量电池以及其它类型的电池产品。

It proposes a method which improves reactivity of denitration products in hydrofluorination with ammonia reduction in order to produce high grade uranium tetrafluoride.

提出了一种在氢氟化过程中同时进行氨还原改善脱硝产品氢氟化反应性的方法，以便生产出高品位的四氟化铀。

The company is doing material full cycle of hydrogen production of polycrystalline zinc reduction in a pilot work, which has produced low-cost solar grade polysilicon.

目前公司正在做物料完全循环氢锌还原法生产多晶硅的中试试验工作，已生产出低成本的太阳能级多晶硅。