Floatable ecological box device for improving reservoir hydro-fluctuation belt environment
Road operation and maintenance construction site safety management and control system
Garbage collection device for sea surface and sand beach
Portal frame for building demolition and demolition method
Quickly-detachable embedded flush type sliding window structure of helicopter
Short mechanism device of double-opening sliding plug door
Bare rock pile foundation construction technology based on integrated construction floating platform
Heavy-duty carrying equipment and construction method thereof
Construction platform with image recognition function and lifting control method thereof
Fabricated recycled aggregate lightweight concrete prefabricated stair
Radiation-proof sliding door for railway passenger car
Large-span triangular truss aerial rotation lifting construction method