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Chinese National Standards
中華民國國家標準
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"Microscopic testing " CNS Standards List

| Method Test | Chemical Reagent | Method test | Cinnabar seal | Pressing Bars | Safety requirements | Round Nuts | Stainless steel |
G-Ferrous Materials & Metallurgy
CNS 2910    2019 Edition
Microscopic testing method for non-metallic inclusions in steel
鋼內非金屬介在物之顯微鏡試驗法

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