NHTSA proposes to require a more stringent endurance test and to add a new high speed test for several heavy load range tires for vehicles with gross vehicle weight rating of more than 10,000 pounds.
国家公路交通安全管理局提出对一些车辆毛重超过10，000镑的载重胎要有一个更严格的耐久性试验和一个新高速测试。
The requirements on steel types and features of wheels with increase of axle load of heavy haul vehicles are discussed.
介绍了大秦线车轮的服役表现，探讨了重载运输条件下车辆轴重增加对车轮钢种特性的要求。
First, the axle-load distribution model of heavy vehicles are constructed on the basis of statistical data.
本文首先根据调查统计数据，建立了河北省干线公路上载货车辆轴重分布模型；
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