Guard rail phaj
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Guardrail phaj thiab MS corrugated cardboard
Yog daim ntawv tseem ceeb ntawm semi-steel guardrail, nws yog corrugated steel guardrail phaj splicing ib leeg thiab txhawb nqa los ntawm cov kab nrib pleb.Nws muaj peev xwm nqus tau kev sib tsoo zog