"Ratchet" thiab "khi-down" yog cov ntsiab lus feem ntau siv rau hauv cov ntsiab lus ntawm kev ruaj ntseg los yog fastening cov khoom, tshwj xeeb tshaj yog thaum lub sij hawm thauj los yog los tiv thaiv kev txav mus los. Thaum muaj qee qhov sib tshooj hauv lawv cov kev siv, lawv hais txog ntau yam ntawm txoj kev ruaj ntseg:
Lub ratchet yog ib qho cuab yeej siv tshuab uas tso cai rau kev hloov kho ntxiv los yog xauv rau hauv ib qho kev taw qhia. Nws feem ntau yuav muaj lub iav thiab lub pawl mechanism.
Nyob rau hauv cov ntsiab lus ntawm kev ruaj ntseg cov khoom, ib tug ratchet feem ntau yog ib feem ntawm ib tug khi-down system. Ratchet straps, piv txwv li, siv lub ratcheting mechanism kom nruj thiab ruaj ntseg pluaj nyob ib ncig ntawm ib yam khoom.
Ratchets feem ntau yog siv rau hauv ntau daim ntawv thov, los ntawm kev ruaj ntseg ntawm cov tsheb thauj khoom thiab cov tsheb thauj khoom mus rau khi cov khoom thauj.
"khi-down" yog ib lo lus dav dav uas hais txog txhua txoj hauv kev lossis cov cuab yeej siv los ua kom ruaj ntseg lossis ceev ib yam dab tsi hauv qhov chaw.
khi-downs tuaj yeem suav nrog ntau yam cuab yeej lossis cov khoom siv, xws li cov hlua, hlua, hlua khi, lossis cov hlua khi, siv los tuav cov khoom kom ruaj ntseg thaum thauj.
Ratchet straps yog hom khi-down, zoo li lwm yam khoom siv thiab cov txheej txheem uas ua haujlwm tib lub hom phiaj ntawm kev ruaj ntseg cov khoom.
Hauv cov ntsiab lus, "ratchet" yog ib hom kev siv tshuab feem ntau siv hauv kev khi-down systems, thaum "khi-down" yog ib lub ntsiab lus dav dav uas suav nrog ntau txoj hauv kev thiab cov cuab yeej siv los tiv thaiv cov khoom. Ratchet straps tsuas yog ib qho piv txwv ntawm kev khi-down uas siv lub tshuab ratcheting.
