短语词组短语rotor -core assemble 转子铁心装配rotor laminated core 转子叠片铁芯rotor r core 转子铁芯laminated leafspring rotor core 叠片式转子铁心stator and rotor core 定转子铁芯laminated rotor core 叠片式转子铁心 返回 rotor core