Multi-degree-of-freedom mobile phased array ultrasonic automatic detection device
Tail door inner plate forming method and tail door inner plate
Preparation method of synthetic leather with patterns, artificial leather and application thereof
Commercial vehicle single-row cab floor, manufacturing method and commercial vehicle
Resistance friction composite heating metal repairing device
Robot and method for laying and recovering ground node type geophone
Commercial vehicle door structure and vehicle door manufacturing process
Large-diameter pipe jacking long-distance pipe withdrawing force transmission device
Oil-driven unmanned aerial vehicle for automatic flight inspection