"Vitrified" CNS Standards List |
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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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CNS 991
2020 Edition Vitrified Grinding Wheels 瓷質燒結研磨輪 |
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