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person:("Li, qingfeng")
Suspended ceiling installation construction method for ultra-large-span heavy steel corridor
Mining anti-explosion lithium ion storage battery trackless rubber-tyred vehicle
Carrying device, site transfer control method, electronic equipment and storage medium
Helicopter tail rotor simulation test device and vortex ring verification method
Device for automatically hoisting shield segment in shield construction and hoisting method
Intelligent positioning system and method for highway construction
Unmanned aerial vehicle for wire clamp X-ray detection
Calcination furnace top lifting device and using method thereof