Specification model:

Blue four-layer auxiliary frame 2000*400 ordinary

Blue four-layer main frame 2000*500 ordinary

Blue four-layer auxiliary frame 2000*500 ordinary

Blue four-layer main frame 2000*500 thickened

Blue four-layer auxiliary frame 2000*500 thickened

Blue four-layer main frame 2000*600 thickened

Blue four-layer co-driver 2000*600 thickened

Blue five-layer main frame * single shot column

Blue five-layer sub-frame * single shot column

Blue five-layer main frame * special customization