135954 ⎘
Lining shafts; Linings therefor using prefabricated lining lowered into a hole filled with liquid or viscous mass
Excavation boring and shoring tool
#2EXCAVATION AND SHORING EQUIPMENT
#3Excavation boring and shoring method and equipment
#4Rectangular working well with preset pipe jacking hole and sliding back wall in water-rich stratum and construction method thereof
#5Column Buffer Thermal Energy Storage