减速机，QY减速机，QY3D减速机，QY3D280减速机，QY3D280-40中硬齿面齿轮减速机。QY3D280齿轮减速机有十六种传动比，QY3D280-16，QY3D280-18，QY3D280-20，QY3D280-22.4，QY3D280-25，QY3D280-28，QY3D280-31.5，QY3D280-35.5，QY3D280-40起重机减速机，QY3D280-45，QY3D280-5