Langfang wedding truss
10. There are 10 thermal insulation connection truss reinforcement manufacturers, namely Langfang Huaneng Thermal Insulation Material Co., Ltd., Hebei Zhongcheng New Building Materials Co., Ltd., Huamei Energy Saving Technology Group (Langfang) Co., Ltd., Langfang Poly Pipeline Technology Co., Ltd., Hebei Runnong Water Saving Engineering Co., Ltd., etc.