Measuring just 1/8th of an inch by 1/4 of an inch, this is the world's smallest working train model by David Smith Photo: BARCROFT

大卫·史密斯的世界上最小火车模型，仅有1/8英寸*1/4英寸大小（约合3.2毫米*6.4毫米）。

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Measuring just 1/8th of an inch by 1/4 of an inch, this is the world's smallest working train model by David Smith Photo: BARCROFT

大卫·史密斯的世界上最小火车模型，仅有1/8英寸*1/4英寸大小（约合3.2毫米*6.4毫米）。

youdao