The practice of smelting ferromanganese silicon with slag of high carbon ferrochrome is introduced.介绍了用高碳铬铁渣做造渣剂冶炼锰硅合金的生产实践.Guimeng , electric, chromium manganese, ferro - alloys such as ferromanganese products.硅锰 、 硅铁 、...
El Salvador has earned the dubious distinction of having the worst soil erosion in continental America.萨尔瓦多因是美洲大陆土壤侵蚀最严重的地方而有了这份不光彩的名声。Soho was still a highly dubious area.索霍区仍然是个靠不住的地方。My parents were dubious about it a...