Beryl is a beryllium-aluminum silicate, and its color comes from small amounts of chromium.
绿宝石其实是一种铍铝硅酸盐，而它的颜色则来自于微量的铬元素。
2
Seawater falling film evaporation heat transfer and anti-fouling characteristics were investigated on ion-plated chromium, TiN and chemically treated aluminum tubes.
考察了淡水和海水在离子镀铬、氮化钛和化学处理水平铝管外表面的降膜传热热性。
3
The block is cast in one piece from gray iron or iron alloyed with other metals, such as nickel or chromium. Some blocks are cast from aluminum.