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在美国的公路上，可以看到一种非常令人惊奇的景观，那是新制造出的牵引车被从工厂运送到用户手中的情景：一辆牵引车的鞍座上“背”着下一辆牵引车的车头，下一辆车又“背”再下一辆车的车头(如题图所示)。北美人称其为“piggyback Pete“(背起车头)。这种方法已在北美地区成功使
On the American highways, one can see a very surprising landscape where the newly created tractor is being transported from the factory to the user: a tractor’s saddle is ”back“ Next tractor’s front, the next car and ”back“ and then the next car’s front (as shown in the title map). North Americans call it ”piggyback Pete" (take up the front). This method has been successfully used in North America