| 摘要 |
A tractor frame comprises a pair of left and right cranked side frame elements disposed in parallel. Each of the cranked side frame elements includes a web portion at a longitudinally intermediate portion of the cranked side frame elements, a front level portion extended forward from the web portion, and a rear level portion extended backward from the web portion so that a top of the rear level portion is lower than a top of the front level portion. A footboard is provided on the top of the rear level portion.
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