After setting, the surfaces of the specimens are ground down using carborundum and alumina.凝固之后, 样品表面连续用金钢砂或氧化铝磨平.Activated carbon, alumina are often used to remove many types of organic materials from aqueous streams.常用...
After setting, the surfaces of the specimens are ground down using carborundum and alumina.凝固之后, 样品表面连续用金钢砂或氧化铝磨平.Support the transport system for alumina and fluoride to the hoppers.支撑氧化铝和氟化盐进入料斗的传送系统.Activated carbon, ...
Believers were treated with the same severity as the Christians had been a few years earlier.和几年前的基督徒一样，信徒们受到了同样严厉的对待。The nuns are making ghee lamps with oil offered by believers.觉母在用信众供奉的油做灯.Religious believers and non ...