Mild Iron Steel Structural Steel H Beam
Lus piav qhia luv luv:
H beam seem feem ntau yog siv rau cov tsev loj xws li cov chaw tsim khoom, lub tsev siab siab, thiab lwm yam), thiab txuas hniav, nkoj, nqa tsheb thauj mus los, cov khoom siv hauv paus, kev txhawb nqa.