Prinsip gawé: manholes stainless steel dirancang pikeun nyadiakeun aksés gampang kana tank gudang di jero taneuh, pipelines, sewers, sarta struktur enclosed lianna.Éta dijieun tina bahan stainless steel awét anu bisa tahan kaayaan lingkungan kasar, kayaning korosi, abrasion, sarta hig ...
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