Dab tsi yog Cov Lus Qhia Tshwj Xeeb Ntawm Kub-dip Galvanized Rectangular Steel Pipes?

Me me specifications: 20 × 40, 30 × 50, 40 × 60, 50 × 100mm
Loj specifications: 100 × 150, 120 × 200, 150 × 300mm
Cov phab ntsa tuab: 1.2 ~ 5.0mm, qhov ntev feem ntau yog 6 meters, thiab tuaj yeem kho rau kev txiav.