Lub hom phiaj tseem ceeb ntawm duav yog txhawm rau khawb av, tig av, khawb qhov av, thiab lwm yam. Nws yog tsim los ntawm ob ntu, tus ntoo tuav thiab ib daim hlau. Ntoo tuav yog ua los ntawm cov ntoo tawv, kwv yees li 4.5 cm tuab, thiab tus tuav yog 1.5 ~ 1.8 meters ntev. Ib feem ua haujlwm ntawm daim hlau yog daim hlau, uas feem ntau muab faib ua ob hom: puag ncig lub qhov ncauj thiab lub qhov ncauj square. Cov hlau hlau ntawm tus qub yog me ntsis arc-puab, thiab cov hlau ntawm qhov tom kawg yog tiaj thiab warped ntawm ob sab. Nws tuaj yeem siv tau raws li cov av zoo thiab lub hom phiaj. Xaiv. Kev teeb tsa tus duav yog qhov yooj yim. Ua ntej txiav qhov kev teeb tsa kawg ntawm tus ntoo ntoo kom haum rau qhov tuab raws li qhov loj ntawm qhov kev teeb tsa ntawm lub duav tuav, tom qab ntawd ntxig tus ntoo tuav rau hauv lub qhov teeb tsa thiab kho nws nrog tus ntsia hlau.
Kev faib tawm duav ntau
1. Raws li cov ntaub ntawv
Ordinary shovel: Feem ntau, nws yog ua los ntawm cov hlau pheej yig dua, uas yooj yim khoov.
Manganese steel shovel: feem ntau yog ua los ntawm 65 manganese steel, 50 manganese steel, manganese steel, siab carbon manganese steel, thiab lwm yam, nrog rau qhov nyuaj.
Stainless hlau spade: feem ntau yog ua los ntawm cov hlau tsis muaj xim, nrog cov xim ci ci thiab muaj zog. Tus nqi kuj kim heev.
2. Raws li hom spade
Taw taw duav: tseem hu ua puag ncig taub hau duav. Lub taub hau ntawm tus duav feem ntau yog ua los ntawm arc. Txij li muaj qee qhov kev sib cuag nrog cov av, tus taw taw duav yog qhov txuag zog thaum khawb.
