QSP type three-in-one speed reductor is made of disk dectric motor and speed reducer, this motor is characterized by its adranced technical performance, brand-new structure small volume, short axial dimension, quick branking and accurate positioning.it is also reliable to operate an easy to maintain. The motor can be startedquickly and stopped right after the power is off. The nacelle is excellent equipment for crane, it is also can used for transport, metallurgical, mine, petrochemical, construction, port, national defense projects. Textite industry and so on