低压直流电作控制电源和应急电源。
首先介绍了直流电位法——裂纹扩展片检测裂纹的方法和原理。
The principle and method for testing surface crack through direct current potential difference are introduced.
低压直流电作控制电源和应急电源。
Low voltage DC power is also provided for control power and emergency power.
低压直流电作控制电源和应急电源。
Low voltage DC power is also provided for control power and emergency power.
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