Lub tes tsho thiab bushing, yog cov tseem ceeb qhov chaw rau ib tug txias ntxuag kub galvanization kab, ntsia lub taub hau thiab caj npab hauv lub dab ntxuav tes yob thiab cov stabilizing yob thiab siv tau los pab raws li cov tsav bearings ntawm cov yob. Lawv yuav tsum zam lub kev sib tw los ntawm kub, corrosion los ntawm molten zinc thiab puas. Vim li no, tsoos khoom muaj disadvantages ntawm ib tug luv luv kev pab cuam lub neej, cov neeg pluag stability thiab siab kev them tus nqi. Nrog tshaj cov ntaub ntawv thiab tshwj xeeb, peb tau tsim lub tes tsho thiab bushing series nrog ib tug ntau yam ntawm zoo li kuj tiv thaiv kub, kuj tiv thaiv puas thiab ruaj khov lub lag luam. Lawv yuav zoo pab cov neeg muas zaub txhim kho cov khoom zoo thiab txo cov kev them nqi, li no satisfying neeg xav tau rau txawv ntau lawm kab.