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Buoyancy feedback type hydraulic constant-pressure energy storage and release system and method
Novel environment-friendly oil pollution disposal device
Oil tank truck organic matter permselective membrane method cleaning system and operation process
Stabilization method for heavy metal in sludge and special device
Large-tonnage freight elevator car structure and using method thereof
Intelligent safety elevator controlled through code scanning
Unmanned aerial vehicle lifting auxiliary wire coating operation method
Water curtain device of marine LNG filling station for LNG leakage protection
Underwater autonomous guide type multifunctional algae and dirt removal device