電車はアルミ以外では何で車体を作られていますか？
The Budd Company got its start in the early 1930s when Edward G. Budd developed a way to build carbodies out of stainless steel. In 1932 he completed his first railcar, dubbed the "Green Goose". It used rubber tires and a stainless steel body, and was powered by the engine out of Budd's own Chrysler Imperial automobile. Budd sold a few of these early powered cars to the Reading Railroad, Pennsylvania Railroad and the Texas and Pacific Railway. The next year, Ralph Budd, only a very distant relation, but president of the Chicago, Burlington and Quincy Railroad at the time, came to Budd to build the "Pioneer Zephyr".
steel