Water-pump-free sand-water stirring system and engineering ship
Variable yield strength aluminum alloy and preparation method and application thereof
Underwater dry cabin wellhead pipeline cabin-penetrating sealing structure
Underground coal mine trackless auxiliary transportation robot
Ultrahigh-toughness Al-Mg-Si alloy material as well as smelting process and application thereof
Tire cushion rubber composition containing modified liquid reclaimed rubber, mixing method and tire
TBM (Tunnel Boring Machine) lossless disassembly method under existing cavern condition