| 摘要 |
PROBLEM TO BE SOLVED: To prevent the sinking of a traveling part. SOLUTION: This structure comprises a lateral pair of crawler type traveling parts, and a plurality of crawlers arranged in each traveling part with a lateral space. Particularly, a drive wheel and a driven wheel are rotatably provided on a truck frame, the crawler is suspended between the drive wheel and the driven wheel to constitute a traveling unit, a plurality of traveling units is arranged in each traveling part with a lateral space, and the drive wheel of each traveling unit is interlocked and connected to a drive shaft.
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