The structure of the reference the same track basic parameters of the crawler tractor, design the structure and size of crawler, make whole design are optimized.

履带的结构同样参考了履带拖拉机的基本参数，设计了履带的结构和尺寸，使整个设计得到了优化。

youdao

Holt, whose great-grandfather invented the first track-type tractor (which led to the formation of Caterpillar), came to the rescue in 1996.

FORBES: Magazine Article

Holt, whose great-grandfather invented the first track-type tractor (which led to the formation of Caterpillar (nyse: CAT - news - people )), came to the rescue in 1996.

FORBES: It's How You Play the Game

In ten minutes, the fire circled the house, and he climbed up to the belvedere to track its progress as it burned to the ditches surrounding his tract, taking out the pump house and a tractor shed, and incinerating his Dodge, which burned hot and high, killing most of the foliage of the live oak shading it.

NEWYORKER: Idols