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Patent Certificate for Load-Carrying Connection Recess with Uniform Load Distribution
Patent Certificate for a Gooseneck Semi-Trailer with Adjustable-Height Steel Plate Spring Suspension
Patent Certificate for the Shenjun Hydraulic Trailer Load Analysis Software
Semi-trailer Design Verification Software Patent Certificate
Patent Certificate for Combined Bridge-Type Connecting Recesses for Hydraulic Trailers
Patent Certificate for a Lifting Low-Flat Semi-Trailer
Invention Patent Certificate for the Automatic Welding Machine for Gooseneck Beams
Patent Certificate for a Wheel-Steering Semi-Trailer Steering Device
Patent Certificate for Bolt-Connected Load-Supporting Balance Beam Semi-Trailer
Patent Certificate for a Semi-Trailer Steering Device
Patent Certificate for a Modular Hydraulic Semi-Trailer Designed to Increase the Load-Carrying Capacity of Connection Recesses
Patent Certificate for a Bridge-Type Transport Frame with Automatic Following and Steering Function
Patent Certificate for a Combined Hydraulic Suspension Trailer with Auxiliary Drive Function
Patent Certificate for the Automatic Welding Machine for Gooseneck Beams
Patent Certificate for an Ultra-Low Semi-Trailer Axle Steering Device
Patent Certificate for the Milling Machine Used in Machining the Connection Surface of Large Slewing Bearing Mounting Seats


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