The constant speed drive section converts the ______ to ______ to make constant frequency electrical power。
A.variable speed ,constant speed B.speed engine, constant speed C.constant speed, variable speed D.variable speed, speed drive正确答案A
The constant speed drive section converts the ______ to ______ to make constant frequency electrical power。
A.variable speed ,constant speed B.speed engine, constant speed C.constant speed, variable speed D.variable speed, speed drive正确答案A
