High-strength strip steel with high surface quality and production method and application thereof
Acid-resistant steel as well as preparation method and application thereof
Modular power system for spacecraft and power propulsion method
Steel belt, preparation method thereof and automobile outer plate
Storage tank supporting structure and double-component power system with same
Mounting and fixing device of a self-locking valve of electric connector
Pressure-dropping type integrated power system and power propelling method
Platform door control system with emergency operation function and control method
Electronic transmission system of train marshalling sequence table