Beijing Beipao Jinjian Steel Structure Engineering Co., Ltd. (BPJJ) is the subordinate body of Beijing Beipao Group. BPJJ is the earliest design construction organization of color plate arch roof construction, who commits itself to arch metal forming roof and large-size steel structure engineering. With the wisdom of several years of experience, we have successfully researched and developed various K-span arch plate roof and no-girder arch roof equipment. Especially, machineType. BPJJ-240/120 can reach the span of 10 meters to 38 meters, which can develop the self-bearing thin-wall arch form...