Lus qhia kom ntxaws khoom raws li nram no:
1. Puag lub ntsej muag / Polygonal lub ntsej muag
2. sib tshooj / Flange kev twb kev txuas
3. Kub Dip Galvanization (ASTM123)
4. daim ntawv pov thawj ISO9001 / ISO14001
5. Ncauj ceg (nplooj): cog lus siab zog khoom ncuav ceg / 250kmph cua tshuab / Pob tshab / tsis muaj steel / anti-UV
6: Daim tawv nqaij: lub cev muaj kab sib xyaw materail / tiag tiag thiab zoo nkauj / ywj / tua / uv / waterproof / fireproof / zog adsorbability / ntev lifespan
7. Nqa pob txha joints / Flange kev twb kev txuas
8. Kev Xim Xim Nyog Xaiv
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