西德慕尼黑的MBB公司最近试制成了一种塑料车身水陆两用轻型越野汽车(图1)。这种汽车的车身是用复方氨基甲酸乙酯(Polyurethan)硬质泡沫塑料整体压制成的层状承载式结构(Sandwich—Bauweise)。敞开式车身同时又是在水中行驶时的浮槽。发动机、变速箱及底盘零件系采用BMW汽车公司小客车的零部件,而且均布置在塑料车身内部,甚至连油箱与油刹车也装在车身里。此外,在制造车身时则已把电气线路浇注在车身内。由于硬质 MBB, a West German company, recently experimented with a lightweight plastic off-road amphibious amphibian (Figure 1). The bodywork of this car is a sandwich-type structure made of Polyurethan rigid foam. The open body is also a float when driving in water. The engine, transmission and chassis components are made of BMW’s passenger car parts and are all housed inside a plastic body, even with a fuel tank and oil brake mounted in the bodywork. In addition, electrical wiring has been cast into the body of a car during manufacture. Because of hard