Koj Yuav Tsum Tau Saib Xyuas Dab Tsi Thaum Yuav Kub -dip Galvanized Rectangular Steel Pipes?

① Saib cov zinc txheej: nws yog ib yam, ci, thiab tsis muaj to.
② Saib qhov loj: square, tsis muaj deformation, tsis muaj distortion
③ Saib qhov vuam: du thiab tsis tawg
④ Xaiv lub chaw tsim khoom loj: ruaj khov thiab lav.
⑤ Tsis txhob sib piv cov nqi: tus nqi qis feem ntau yog cov txheej zinc nyias thiab tsis yog - tus qauv nyias phab ntsa thicknesses.