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Chinese National Standards
中華民國國家標準
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"Welding Neck" CNS Standards List

| Iron ores | Method Test | Standard Conditions | Footwear − | Hexagon Head | Counter boring | Method Measurement | Steel Methods |
B-Mechanical Engineering
CNS 7558    2020 Edition
Welding-Neck Steel Pipe Flanges (30 kgf/㎠)
熔接頸鋼製管凸緣（30 kgf/㎠）

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