Cov kev siv hauv kev tsim vaj tsev?
Txhim kho steel, I-beams, H-beams, lub kaum sab xis steel, steel daim hlau, Hoobkas / choj / tsev siv, scaffolding.
27. Kev siv hauv kev tsim khoom siv tshuab?
Ncej, hauv paus, vaj tse, flanges, shafts, bolts thiab ceev, ua liaj ua teb machinery qhov chaw.
28. Kev siv hauv tsheb thauj mus los?
Tsheb / tsheb thauj khoom thav duab, tsheb thauj khoom, ntim khoom, cov khoom siv rail, tsis yog -cov khoom tseem ceeb ntawm nkoj.
29. Lwm daim ntawv thov?
Cov rooj tog zaum, txee, khoom siv hauv chav ua noj, tsawg- cov hlab ntsha siab, cov kav dej, khoom siv kho mob.
30. Q235 vs Q345 (16Mn)?
Q235: Carbon structural steel, yield zog 235MPa, pheej yig dua.
Q345: Tsawg- alloy siab- lub zog steel, yield zog 345MPa, siab zog, kim dua.