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W beam guardrail
ʻO ka mea nui no ia ka Q235B (S235Jr ka ikaika hua ma mua o 235Mpa) a me Q345B (S355Jr ka ikaika o ka hua ma mua o ka 345Mpa).
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ʻEkolu kaola kiaʻi
ʻO ka guardrail ka mea nui e hahai i ka maʻamau AASHTO M180, GB-T 31439.1-2015 a me EN1317.
