Yog vim li cas rau qhov nrov ntawm cov tub rog shovels

Ua ntej tshaj plaws, cov tub rog duav yog qhov sib txawv ntawm cov shovel siv los ntawm cov neeg ua liaj ua teb thaum lawv ua haujlwm. Piv nrog rau shovel, cov tub rog duav yog sib dua, luv dua, sib dua, thiab ntse dua duav, thiab nws muaj zog thiab ruaj khov dua. Ntxiv mus, cov tub rog duav tsim los ntawm peb lub teb chaws muaj cov hniav, yog li nws yog sharper dua shovel. Ntxiv nrog rau cov no, kuv lub teb chaws cov tub rog engineering duav tau dhau los ua quenching, yog li ntawd lub hardness ntawm cov tub rog engineering duav ua nyob rau hauv txoj kev no tuaj yeem ncav cuag qhov hnyav heev. Tej zaum koj yuav tsis nkag siab tias nws txhais li cas. Qhov ntsuas no txhais tau hais tias kuv lub teb chaws cov tub rog engineering duav Koj tuaj yeem txiav tawm cov hlau hlau nrog txoj kab uas hla ntawm 5 hli ntawm qhov xav tau.
Yog koj hais li no, koj puas muaj ib tug txheeb ze to taub, yog li ntawd, kev siv tub rog shovels nyob rau hauv peb lub teb chaws yog tseem dav heev, txawm nws yog khawb pits, ua tsev, chopwood, clearing landmines, tua cov yeeb ncuab los yog tua cov yeeb ncuab. Nws yog ib tug neeg ncaws pob zoo, yog li peb cov tub rog duav tseem hu ua universal shovel.
Yog li ntawd, peb lub teb chaws cov tub rog duav tau nto moo. Lub teb chaws coj peb lub teb chaws cov tub rog duav thiab pib tsim lawv tus kheej tub rog duav, thiab lub teb chaws Yelemees ib zaug tau sau ib phau ntawv tshwj xeeb rau nws tus kheej tub rog duav, vim nws ntshai nws cov tub rog. Siv tsis tau, nws kuj tuaj yeem pom tias peb lub teb chaws cov tub rog shovel nrov npaum li cas.