"sewers " CNS Standards List| Methods Test | Finger Sack | Shirts | Method Test | Sodium carbonate | Chemical Reagent | Flavored milk | Hydrochloric acid | |
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CNS 12938
2020 Edition Vitrified clay pipes and fittings and pipe joints for drains and sewers 排水及污水用瓷化黏土管以及其配件與管接頭 |
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