Non-stoichiometric defects often occur in transition-metal compounds.
非化学计量的缺陷常常出现在过渡金属的化合物中。
2
Ultrasonic waves produce pulsed signals, by means of which various defects in metal can be detected.
超声波能产生脉冲信号，用以检测金属中各种缺陷。
3
By using metal mold casting, we can control mold temperature, infusing temperature, infusing speed to avoid defects of pore, cold partition, shrink and loose.