对DX - 3型扫描电子显微镜进行了总体维修和复杂电路图的简化。
The type DX 3 electronic scanning microscope has been wholly maintained, and its complexed circuit diagrams have been simplified.
若将他励直流电动机输出功率的机理等效为一个与电动机电枢绕组并联的可变电阻，可以得到他励直流电动机可变电阻型等效电路图。
The output power mechanism of a separately excited DC motor can be equivalent to a variable resistance, which is parallel with the armature winding of the motor.
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