MMA information multi-core single-chip microcontroller experiment box 1 jiangsu qianjie aerial construction repair and anti-corrosion co., ltd. is a provincial construction unit under the construction bureau of tinghu district, yancheng city. it has professional qualifications for aerial operations and anti-corrosion and insulation projects issued by the national construction department. it mainly undertakes high-altitude special technical services such as new construction, installation, demolition, maintenance, anti-corrosion, and inspection of ultra-high structures. 50 and
