Crawler tsheb laij teb muaj zog traction loj, siab traction efficiency, tsawg grounding tshwj xeeb siab, muaj zog adhesion, zoo ua hauj lwm zoo, yooj yim khiav lag luam, yooj yim txij nkawm, thiab cov nqi siab ntawm cov cuab yeej, tshwj xeeb tshaj yog haum rau hnyav-load cog kev lag luam thiab terraced o .. .
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