king pin

Thaum nws los txog rau towing hnyav loads, muaj ib tug txhim khu kev qha thiab high-zoo trailer huab tais pin yog qhov tseem ceeb. Tus huab tais tus pin yog ib qho tseem ceeb ntawm lub log thib tsib hitch system, muab kev ruaj ntseg kev sib txuas ntawm lub trailer thiab lub tsheb towing. Ib qho ntawm cov ntaub ntawv ntseeg siab tshaj plaws siv rau kev tsim vaj ntxwv pins yog 40CR, paub txog nws lub zog thiab kav ntev. Qhov no ua kom ntseeg tau tias tus huab tais tus pin tuaj yeem tiv taus lub siab loj thiab qhov hnyav ntawm lub trailer, muab kev nyab xeeb thiab ruaj khov kev tsav tsheb.