Semi-trailer muaj cov kev faib tawm hauv qab no: ① Raws li tus naj npawb ntawm axles muab faib ua ib lub qag, ob lub qag thiab ntau lub qag; ② Raws li daim ntawv ntawm lub thawv, nws muab faib ua kem phaj thiab lub thawv hom; ③ Raws li daim ntawv ntawm cov khoom platform, nws muab faib ua kauj ruam, concave beam thiab rooj; ④ Raws li kev ua haujlwm tshwj xeeb, nws tau muab faib ua tus kheej tso tawm semi-trailer, sprinkler semi-trailer, bulk cement semi-trailer, thawv semi-trailer, tub yees semi-trailer, thiab lwm yam.
Lub semi-trailer yog tsim los ntawm plaub yam: traction coupling ntaus ntawv, tswj system (xws li lub kauj thiab braking system), bearing system (xws li thav duab, thawv, qag, log thiab ncua kev kawm ntawv, thiab lwm yam) thiab accessories (xws li auxiliary txhawb pab kiag li lawm), khoom siv kev nyab xeeb, khoom siv hluav taws xob, thiab lwm yam). Cov tsis tseem ceeb ntawm semi-trailer: ntim ntawm lub thawv tsheb, qhov siab ntawm cargo platform, wheelbase thiab log puag, pem hauv ntej ncua kev kawm ntawv thiab rear ncua kev kawm ntawv.