Lub qhov rais sill yog ib feem ntawm lub qhov rais thav duab. Lub qhov rai thav duab ib puag ncig thiab txhawb nqa tag nrho lub qhov rai moj khaum los ntawm kev siv ntau yam sib xyaw hauv ntau cov lus qhia. Qhov rai lub taub hau, piv txwv li, tiv thaiv cov ROP, qhov rai Jambs tiv thaiv ob sab ntawm lub qhov rai) yog cov xim zoo nkauj, muaj zog, muaj zog thiab ruaj khov, thiab yuav tsis yog deformed lossis discolored. Nws yog haum heev rau lub qhov rais sills.
Muaj ntau ntau yam txawv ntawm pob zeb qhov rai sills. Tus ntug ntawm lub qhov rais tuaj yeem txiav hauv lub voj voog. Nws zoo nkaus li tuab thiab zoo nkauj. Nws tuaj yeem tiv thaiv phab ntsa ntawm lub qhov rais, thiab nws yog puag ncig thiab tsis ua phem rau tib neeg. Ntawm no yog kaum ob ntawm cov qauv tsim qauv tsim qauv.
Vim muaj cov khoom sib txawv ntawm lub pob zeb, nws tuaj yeem faib ua cov qhov rai Marble, travertine qhov rai sills, limestone qhov rais sill, limestone qhov rais sills. Nws tuaj yeem nruab rau sab nraum zoov thiab nyob sab hauv tsev. Hom nyob sab hauv tsev yog chav ua noj sill, cov qhov rooj chav dej sill, da dej qhov rai sill. Lub qhov rais bullnose sill yog qhov nrov tshaj plaws tsim. Qhov kev cai Marble qhov rai sills raug lees txais. Thov hu rau peb kom paub meej ntxiv.
Lub Sijhawm Post: Nov-17-2021