问题:
In order to change the direction of rotation of a D-Cmotor ()
(1) the field leads must be changed
(2) the input leads must be changed
A . (1)only
B . (2)only
C . either(1)or(2)
D . neither(1)or(2)
In order to change the direction of rotation of a D-Cmotor ()
(1) the field leads must be changed
(2) the input leads must be changed
● 参考解析
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