Tau them ntau cov ntaub ntawv hais txog cov khoom siv slack tsis siv neeg, cov lus nug tseem tshuav: lawv puas xav tau kev saib xyuas thaum lub sijhawm ua haujlwm ib txwm muaj, thiab yog tias muaj, yuav tsum ua li cas? Kuv ntseeg tias ntau tus neeg tsav tsheb tsis paub tshwj xeeb txog cov ncauj lus no.
Hauv kev muaj tiag, tsis siv neeg slack adjusters * ua * xav tau kev saib xyuas thaum siv ib txwm. Qhov no yog vim lawv interiors tsev ntau yam iav mechanisms; lubrication kom raug yog qhov tseem ceeb los xyuas kom meej tias cov khoom siv kho tshuab sab hauv ua haujlwm tau zoo thiab ywj pheej. Yog li ntawd, lithium{2}} roj raws li yuav tsum tau siv txhua 20,000 km. Ntxiv nrog rau qhov kev xav tau tshwj xeeb no, tsis muaj lwm yam kev saib xyuas ntxiv yog qhov tsim nyog, ua kom tag nrho kev siv thiab kev saib xyuas ntawm cov khoom no kuj yooj yim.
