据报道,美国田纳西农业机械公司最新研制出一种水陆两用拖拉机。这种拖拉机的车身质量有所减轻,发动机和底盘采用铝合金制成,四个车轮采用聚酯纤维填充塑料制成,车体质量减轻。新型拖拉机在旱地工作时,四个车 It is reported that the United States Tennessee Agricultural Machinery Company recently developed a amphibious tractor. This tractor body quality has been reduced, the engine and chassis made of aluminum alloy, four wheels made of polyester fiber filled plastic, body mass reduction. New tractor when working in dry land, four cars