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See Chinese contents: GB/T 43400-2023 GB/T 43400-2023: Road vehicles -- Trailers up to 3.5 t -- Calculation of the mechanical strength of steel drawbars
This Document specifies a simplified calculation process for the bending mechanical strength of steel drawbars for trailers up to 3.5t. This Document applies to steel drawbars equipped on center-axle trailers of categories O1 and O2.
