Daim ntawv thov:
Lub tshuab yog tsuas yog thov los kos cim aluminium profiles ntawm kab, sib xyaw rau hauv cov saw hlau loj ntau lawm. Cov khoom lag luam ntev li 3.1 hli, cim rau txhua 5mm. Txoj kab ntau lawm yog li ntawm 3 txog 5 meters ib feeb twg.