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Water surface garbage cleaning device based on water ecological restoration
Rapid and uniform unmanned aerial vehicle fertilization device for rice planting
Pure electric multifunctional train carriage leaking stoppage vehicle
Positioning detection device for subway power supply installation
Off-the-road tire tread rubber composition and production method thereof
Modified phenolic resin, preparation method thereof and rubber composition
Method of ship ice resistance model experiment based on non-refrigerated model ice
Essence for preparing aromatic tire, rubber composition and preparation method thereof
Environment-friendly dust falling structure for civil construction site