Nws txhais li cas tias semi-trailer yog peb-kab rau-qag hom?

Peb-kab thiab rau-axle txhais tau hais tias peb txuas txuas ntxiv mus rau 6 txuas hniav, uas yog sib npaug rau txhua qhov ntawm peb tus choj hlais rau ntawm qhov nruab nrab, lossis peb kab kab rov tav, tab sis cov log tsheb dhau los ua 24, thiab 12 lub log tsheb ntxiv. ntxiv nyob nruab nrab ntawm.