The thrie - beam barrier involved and its curved end - terminal design comply with international safety standards . many countries , like australia and the united states etc , have used this type of barrier and its effectiveness is proven 意外涉及的三波式防撞欄及其卷尾式末端設(shè)計(jì),符合國(guó)際安全標(biāo)準(zhǔn),很多國(guó)家如澳洲和美國(guó)等均有采用,效果良好。