Cov khoom siv suab nrov feem ntau suav nrog cov ntaub ntawv hlau, cov ntaub ntawv pob zeb, cov ntaub ntawv PC thiab FRP cov ntaub ntawv.1. Hlau suab barrier: txhuas phaj, galvanized phaj thiab xim hlau phaj yog cov khoom siv hlau.Cov hlau suab barrier muaj hom kaw thiab microporous punching hom, uas tuaj yeem ...
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