This paper discusses the influence on calcium carbide production of lime material, carbon material as well as the furnace chargeproportion and operation.
讨论了石灰原料、碳素原料以及炉料酌情比和操作对电石生产的影响。
2
As of August, charge CARDS made up over 60% of Amex's billed business, and analysts reckon this proportion is growing.
截至去年八月份，签账卡占美国运通收费业务的60%以上，而且分析家认为该比例仍在上升中。
3
When this gel is placed into a bath and an electrical charge applied across the gel, the biomolecules migrate and separate according to size in proportion to the amount of charge they carry.