Yuav xaiv dab tsi thiab yuav xaj li cas kom cov hniav nyiaj hniav kub haum rau koj? Nws tuaj yeem ua rau ntau hom. Qhov no yog ib txwm version ntawm rods, ces kaum los yog profiles, raws li zoo raws li cov neeg tseem ceeb forged khoom. Ntawm no, txhais tes ntawm tus tswv tawm nws cov cim, ua kom zoo nkauj tiag tiag ntawm cov hlau zoo tib yam. Lattices kuj txawv ntawm txoj kev fastening thiab qhib