1, Cov qauv thiab cov yam ntxwv ua haujlwm ntawm cov cuab yeej hluav taws xob
Cov riam hluav taws xob yog cov cuab yeej siv los siv cov xov hlau thiab txiav cov khoom. Lub tshuab hluav taws xob riam muaj ib tug kov thiab ib tug hniav. Raws li pom nyob rau hauv daim duab hauv qab no, cov khoom siv hluav taws xob feem ntau muaj xws li cov riam hluav taws xob zoo tib yam thiab cov khoom siv hluav taws xob ntau yam.
2, Cov lus qhia rau kev siv cov riam hluav taws xob
Thaum siv cov cuab yeej hluav taws xob siv hluav taws xob los siv cov txheej txheem rwb thaiv tsev ntawm lub cable, ib tus yuav tsum tuav lub riam nrog ib txhais tes, tig cov hniav tawm sab nraud, thiab txiav cov hniav mus rau hauv cov txheej rwb thaiv tsev ntawm lub kaum sab xis ntawm 45 degree. Tom qab txiav rau hauv cov txheej rwb thaiv tsev, nqa cov hniav me ntsis (kwv yees li 25 degree) thiab thawb mus rau ntawm cov hlau kawg nrog quab yuam, ceev faj tsis txhob txiav cov tub ntxhais hlau.
