Qhov chaw qhib qhov ncauj hlau yog cov khoom siv tshwj xeeb tsim rau kev xaiv hauv pem teb, cov nyhuv siv rau hauv khw muag khoom, thiab kev lag luam kom yooj yim heev Yog li ntawd, thaum kev lag luam ntsib kev kub ntxhov, kev tswj hwm kev kho kom zoo dua los ntawm ntau yam kev txiav txim siab lossis cov khoom lag luam raug; Rov ntsuam xyuas lub khw muag khoom tau los ntawm cov lag luam {}} kev lag luam zoo nkauj ntawm lub teb chaws muaj kev phom sij ntawm lub teb chaws tsis muaj kev tiv thaiv {}} ua kev tsim lub teb chaws, Tuam Tshoj tus neeg lag luam kev khwv nyiaj txiag tau txuas ntxiv txhim kho hauv cov khoom lag luam pobzeb tsis ntev los no {}}
Qhov Ncauj Hlau Hlau yog tus txheeb ze rau cov formwork:
1. Kuv tuaj yeem siv los ua kev txhawb nqa kev ruaj khov rau cov qauv muaj zog, thiab cov qauv zoo tib yam yuav tsum tau tawm tsam;
2.} yooj yim rau nteg steel tuav, nruab cov kav dej thiab kab;
3. Nws tuaj yeem txuag tau tus nqi raw, txuag cov pob zeb tsawg kawg, khaws cov pob zeb uas nyob hauv av ntawm cov qhib pem teb yog concave thiab convex;
{{04. lub teeb hnyav, muaj zog siab, thiab ua tau zoo hauv av qeeg tsis taus;
5. Txoj kev tsim kho yog yooj yim thiab tuaj yeem siv los ua lub tshuab hlau, tsau}} square metres ib hnub {}}
