"Specification natural " CNS Standards List| Small Size | Method Test | Running Test | Sprue Bushings | Method test | Pulps | Rating direct | Method Test | |
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CNS 21927-2
2022 Edition Smoke and heat control systems − Part 2: Specification for natural smoke and heat exhaust ventilators 煙與熱控制系統－第2部：煙與熱自然排放通風設備 |
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CNS 3719
2019 Edition Specification for natural gas 天然氣 |
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