Yuav siv cov pobzeb leveler li cas?
1 Ua ntej siv cov nplais nplais, qhov chaw yuav tsum tau ntxuav ua ntej.
2 Kev sib koom ua ke ntawm ntug ntawm cov nplais hauv pem teb thiab lub kaum sab xis ntawm phab ntsa yuav tsum tsim nyog, thiab cov phaj hauv qab yuav tsum npog qhov sib txawv.
3. Thaum kuaj xyuas qhov flatness ntawm cov pobzeb leveler, yuav tsum tau kuaj xyuas qib 2M. Qhov yuam kev yuav tsum tsis pub tshaj 3 hli, thiab qhov siab qhov sib txawv ntawm cov cib uas nyob ib sab yuav tsum tsis pub tshaj 2 hli.
4. Thaum lub sijhawm ua haujlwm ntawm cov pobzeb leveler, hauv pem teb yuav tsum ruaj khov, qhov hollowing yuav tsum tau tswj tsis pub dhau 5 feem pua, thiab qhov hollowing cheeb tsam ntawm ib sab yuav tsum tsis pub tshaj 10 feem pua, thiaj li tsis cuam tshuam rau kev zoo nkauj thiab ruaj khov cov nplais.
5 Qhov dav ntawm cov vuas hauv pem teb yog 2 hli, tsawg dua los yog sib npaug li 3 hli, thiab cov pob qij txha yuav tsum sib npaug.
6. Kab rov tav yuam kev yuav tsum tsis pub tshaj 4 hli.