Winch, tseem hu ua hoist, yog ib qho khoom siv me me thiab lub teeb nqa nrog cov hlua khi hlua los yog cov saw los nqa lossis rub cov khoom hnyav.
Lub nruas yog qhov tseem ceeb tshaj plaws ntawm lub tshuab winch, Peb lub tuam txhab tshwj xeeb hauv kev tsim cov LEBUS grooved druml, LEBUS zawj tuaj yeem daws qhov teeb meem ntawm ntau txheej winding hlua, tuaj yeem zam qhov tshwm sim ntawm txoj hlua khi hlua, txuag txoj hlua zoo heev. , txhim kho kev ua haujlwm zoo.
Lub tshuab LeBus yog ib txoj hauv kev los tswj cov hlua khi hlua ntawm lub nruas winch kom tsis muaj kev txwv rau cov txheej txheem uas tuaj yeem ua rau muaj kev nyab xeeb, tsis hais txog qhov hnyav ntawm kev thauj khoom thiab nrawm lossis qhov loj ntawm txoj hlua. thiab nruas.