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Novel sulfonated polyimides containing multiple cyano groups for polymer electrolyte membranes
Pressure test simulation device for underwater equipment
Automatic uncoupling control method for internal combustion locomotive
Dovetail-shaped marine steel-aluminum mortise and tenon joint
Control device for energy conversion of hybrid power locomotive, locomotive and control method
Remote control electric vehicle hook multifunctional operation machine and use method thereof
Vertical forming and hoisting equipment for reinforcement cage