Powder produced in this way has a uniform particle size distribution, lowoxide content and high purity.
这种方法制造出来的焊锡粉具统一的粒径、氧化和高纯度的特性。
2
From the Middle East the Chinese acquired a blue pigment—a purified form of cobalt oxide unobtainable at that time in China—that contained only a low level of manganese.
中国人从中东获得了一种蓝色颜料，这是一种当时在中国很难得到的纯净的氧化钴，这种颜料只含有少量的锰。
3
Quartz Wool was made from high-purity quartz, extremely low in metallic oxide impurities.