Steel beams yog siv nyob rau hauv ntau yam kev siv. Lawv feem ntau siv los ua cov txheej txheem tseem ceeb hauv cov tsev, muab kev txhawb nqa rau hauv pem teb, ru tsev, thiab phab ntsa. Hlau kab teeb kuj tseem siv rau hauv kev tsim kho choj, qhov chaw uas lawv pab kom ncua kev deb loj thiab txhawb nqa qhov hnyav ntawm tus choj lawj.
Cov cwj pwm tseem ceeb
Kev lag luam tshwj xeeb yam ntxwv
| Hom | Gnee |
|
Qib |
304 |
| Txuj | ASTM |
| Ua siab ntev | ±1% |
| Invoicing | los ntawm qhov hnyav |
|
Lub sij hawm xa tuaj |
8-14 hnub |
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