query hunan ruidun new materials technology co., ltd. provides foam concrete roadbed filling construction, foam concrete backfill construction, etc. it is a research and development of new energy-saving and environmentally friendly materials for prefabricated buildings, new energy-saving and environmentally friendly materials for prefabricated buildings, new energy-saving and environmentally friendly materials for prefabricated buildings, and new energy-saving and environmentally friendly materials for prefabricated buildings. an enterprise that integrates project site construction and promotion. 1 it is mainly divided into two types, one is within the site 50 people
