1, standard promotion: suitable for top space in the door: within 200-300 - mm.
2, high promotion: suitable for top space in the door: > 300 mm < it was high
3, vertical: applicable to door top space: > or = door opening height

We are a large group which has whole manufacturing system, the abilities of relevant supporting facility and products production and processing. Also Xinguangzheng is an expert in providing integrated turnkey steel structure project solution especially chicken cage, steel structure chicken house and poultry farm projects including survey, design, manufacture and installation around the world.