A.星-三角形換接起動 B.起動補償器 C.轉(zhuǎn)子回路串接電阻 D.轉(zhuǎn)子回路串接電抗
A.1450r/m B.1440r/m C.960r/m D.950r/m
A.3 B.2 C.2/3 D.3/2