"Hollow concrete" CNS Standards List| Method Test | Method Test | Zinc coated | Method test | Method Test | Methods test | Method test | Canned Fishes | |
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CNS 8905
2018 Edition Hollow concrete blocks for buildings 建築用混凝土空心磚 |
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CNS 8905
2018 Edition Hollow concrete blocks for buildings 建築用混凝土空心磚 |
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