model-a-tractor 拖拉机
tractor-scraper model 牵引式铲运机型号
tractor linear vibration model 拖拉机线性振动模型
Pictured is a 1917 Case traction engine, which was the world's first tractor model.
图为1917年为例牵引引擎，这是世界上第一个拖拉机模型。
They are thought to have leapt together with two rucksacks, one holding the body, the other filled with some of the child's favourite cuddly toys and a model tractor.
据推测，他们双双跳崖时携带着两个帆布包，一个装着儿子的遗体，另一个装着孩子心爱的抱抱玩具，还有一部玩具拖拉机。
A good calculating model of tractor economical life is no use, if there is no real, reliable data.
一个再好的拖拉机经济寿命计算模型，如果没有真实、可靠的数据，也是枉然。
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