Nguyen , V. T., Tran, V. H., Nguyen, T. M. T., Nguyen , M. P. and Nguyen, V. H. (2022) “Research on Improving the Working Efficiency of the Group Installation of Outdoor Units of the VRF Air Conditioning System ”, Journal of Technical Education Science, 17(Special Issue 03), pp. 33–41. doi: 10.54644/jte.72B.2022.1265.