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第一个汽车专用试验场1924年,通用在密歇根州建成了一个汽车专用试验场,开始在专业试验场测试车辆,该试验场被用作在各种天气和复杂路况下的汽车安全和性能测试,开创了汽车行业试验场设施的先河。第一台全钢车顶1934年,车身供应商费雪车身公司为通用开发出业界首个整幅全钢车顶,1935年起陆续在通用汽车旗下车型使用。全钢车顶的应用,大大提升了车架的整体刚性。而在此之前,汽车车顶均采用木制框架搭配外围帆布
The first car-dedicated test ground In 1924, GM built a car-dedicated test ground in Michigan and began testing vehicles at a dedicated test ground used as a vehicle safety and performance test in a variety of weather and in complex road conditions , Creating a precedent for the automotive industry test facility. First All-Steel Roof In 1934, body supplier Fisher Body Company developed the industry’s first all-steel all-steel roof for General Motors, which has been used by General Motors since 1935. The application of all steel roof, greatly enhance the overall rigidity of the frame. Prior to this, the car roof with wooden frame with a peripheral canvas