1. Ua ntej siv cov xaim, xyuas qhov chaw rwb thaiv tsev thiab cov tsos ntawm cov hlau kom puas. Yog tias cov hlau tsis thauj lossis khaws cia kom zoo, nws yuav ua rau muaj kev puas tsuaj thiab cuam tshuam rau kev siv.
2. Thaum chav tsev kub qis dua 0 degree, thiab lub vojvoog dabtsi yog khoov tsawg dua 6 npaug ntawm cov kab hluav taws xob sab nraud, kev tawg yuav tshwm sim, yog li yuav tsum tau them nyiaj tshwj xeeb.
3. Kev ua haujlwm kub ntawm cov hlau yuav tsum tsis pub tshaj 70 degree, tshwj tsis yog tshwj xeeb specifications.
4. Xaiv tus neeg xyuas pib cross-section haum rau lub peev xwm nqa tam sim no, thiab lub qhov hluav taws xob tuaj yeem siv BV2.5 square millimeter. Lub tshuab cua txias nrog 1 tus nees lossis tsawg dua yuav tsum siv 1.5 square metres, thiab lub zog loj dua yuav tsum siv 2.5 square metres lossis loj dua -section xov hlau.
5. Txhawm rau kom ntseeg tau qib kev nyab xeeb ntawm qhov chaw nyob, yuav tsum tau txais yuav tsum tau txais yuav tsum tau txais yuav tsum tau txais ntau lub- channel ceg faib Circuit Court.
6. Thaum siv, qhov saum npoo ntawm cov hlau yuav tsum tsis txhob kov cov cua sov.
