I-Hexagonal guardrail network corrosion ngokwezifiso ilahlekelwe yizici zoqobo, ukuma, umbala kanye nezakhiwo zomshini zizoshintsha, okuholela ekulimaleni kwemishini, ukuvuza kwamapayipi, njll., ikakhulukazi, kulula ukuphuka, ukulahlekelwa umsebenzi wokuvikela wasekuqaleni.Ngokuvamile, kukhona izihlobo ezintathu ...
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