Galvanized Cchannel steel zoo zoo structural c purlin kev muag khoom

Galvanized hlauCov ntawv thov yog siv rau kev txhawb nqa hauv tsev.Feem ntaugalvanized c channelpurlins yog cov khoom tseem ceeb ntawm cov ru tsev.Lub ru tsev purlins tau txais kev txhawb nqa los ntawm rafters los yog lub tsev phab ntsa thiab lub ru tsev lawj yog muab tso rau ntawm purlins.