巴德公司
In 1931, the Budd Company reached an agreement with the French tire company Michelin to produce pneumatic-tired rail motorcars in the US, as an improvement on the heavy, underpowered and shimmy-prone "doodlebugs" that ran on American tracks. In that endeavor, Budd would produce lightweight rail equipment utilizing unibody construction and the high strength alloy stainless steel, enabled by shot welding, a breakthrough in electrical welding technique. The venture produced articulated power-trailer car sets with streamlined styling, which left the Budd Company just a (much) more powerful engine away from producing a history-making streamlined trainset.