Lub tsheb nrau av txhuam yog qhov hnyav hlau phaj uas' s tau tsa pem hauv ntej ntawm tsheb nrau av. Feem ntau ua haujlwm nrog kev thawb ntawm cov khoom suav nrog pob zeb, xuab zeb, av, thiab tsis kam, nws' s zoo li tau ua hauv ntau qhov kev teeb tsa, txhua qhov raug tsim rau qee yam haujlwm.
Tsis pub dhau lub tsheb nrau av qeb," txheem" nyhav txhais tau tias muaj ntau yam sib txawv thaum hais txog cov hniav, raws li txhua lub tshuab raug tsim kom muaj cov khoom lag luam nyob rau lwm txoj kev sib txawv.Muaj qee hom sib txawv li tuaj.
S Hniav
Qhov no yog hom feem ntau ntawm bulldozer hniav. Hniav ncaj, lossis S hniav rau luv luv, yog ntxaib zoo li tus duab plaub loj. Siv feem ntau rau kev tshem tawm av, ua tiav kev sib tw, thiab thawb cov khoom nyob ib puag ncig cov haujlwm, tus hniav S yog kev tswj hwm hydraulic thiab tuaj yeem tilted rau kev khawb - tab sis kev khawb qhov tob yog qee qhov txwv.
U Hniav
Tsim nrog qhov siab ntau dua li ntawm S S hniav, U hniav nti muaj qhov nkhaus me me rau nws (zoo li U lub siab me me) thiab tseem muaj cov paib nchuav rau ob qho kawg kom khaws cov khoom uas muaj nyob hauv qhov dav ntawm cov hniav thaum ua haujlwm. Hom hniav no tau tsim rau lub sijhawm ntev dua, ua kom lub tsheb nrau av mus thawb cov khoom hla ib daim teb lossis tag nrho cov haujlwm. Xws li, lawv zoo tshaj plaws rau kev txav pob zeb thiab pob zeb, pob zeb, thiab tshooj ntawm pob zeb. Tab sis lawv kuj muab cov av hloov pauv zoo heev thiab lwm cov av dhau ntawm kev ncua deb.
SU Hniav
Lub semi-U lossis SU blade sib xyaw tsim tsim thiab ua haujlwm ntawm S thiab U blades, muab cov qhov zoo tshaj plaws ntawm ob qho tib si los muab ntau qhov kev ua haujlwm. Txawm hais tias ib qho SU hniav feem ntau muaj peev xwm nkag qis dua hauv av dua li S hniav, nws ntxiv cov pa nchuav ntawm ob sab kom muaj cov khoom tsis pub dhau qhov dav ntawm cov hniav.U hniav yog qhov zoo rau rov qab, ditching thiab crowning, leveling, thiab tshem tawm stumps.
Lub Hniav
Lub kaum sab xis hniav yog ib qho me ntsis ntau maneuverable version ntawm S S hniav. Ua nrog lub duab plaub sib txawv, nws' s mounted ntawm C-thav duab kom nws cia pivot rau sab laug lossis sab xis. Cov qauv niaj hnub yog hydraulically tswj thiab kuj suav nrog kab rov tav qaij rau qee qhov kev ua haujlwm khawb. Raws li tus qauv S hniav, nws cov duab tso cai rau nchuav los ntawm ob sab, ua rau nws tsis muaj txiaj ntsig rau thawb cov ntaub ntawv dhau mus ntev.Intended rau kev thau cov kev siv dav dav suav nrog kev hloov, ditching, thiab tshem tawm cov stumps, nws' s zoo tagnrho rau tshem tawm cov ntawv thov raws li raws li kev kho vaj tse thiab kev tsim kho