In the dead weight stage of heavy truck semi-trailer, under the premise of ensuring the strength of main components, the reasonable characteristics of trailer structure and reliability characteristics of strength shall be evaluated as much as possible according to the effective load weight ratio of heavy truck. The semi-trailer to the dead weight weight weight weight weight utilization coefficient with the increase of truck mass plus the load utilization coefficient of Trailer η the coefficient of using weight η the larger the unit weight is The utilization coefficient of heavy truck semitrailer with larger load is as follows<br>
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