牵引变压器常用的结线方式有哪几种?
参考答案:
(1)三相Y/Δ结线。
(2)单相Y/Δ结线。
(3)斯科特结线。
(4)伍德布里奇结线。
(5)三相Y/Δ组成X结线。
— How was the party?
— I don't know. I ________ in without a ticket. [ ]
A. was allowed
B. was not allowed
C. am allowed
D. am not allowed
选择变速