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GB/T 5777-2019 無(wú)縫和焊接(埋弧焊除外)鋼管縱向和/或橫向缺欠的全圓周自動(dòng)超聲檢測 Automated full peripheral ult...2023-09-06

DIN ISO/TR 21477-2018 Optics and photonics - Preparation of drawings for optical elements and systems - Sur...2023-08-17

BS ISO 10110-7-2017 光學(xué)及光學(xué)儀器.光學(xué)元件和系統圖形的制備.第7部分:表面缺陷公差 Optics And Photonics. Prepa...2023-07-01

DIN ISO 14997-2018 Optics and photonics - Test methods for surface imperfections of optical elements (ISO 1...2023-06-11

BS EN ISO 10042-2018 Welding. Arc-welded joints in aluminium and its alloys. Quality levels for imperfecti...2023-06-09

GB/T 40385-2021 鋼管無(wú)損檢測焊接鋼管焊縫缺欠的數字射線(xiàn)檢測 Non-destructive testing of steel tubes-Digital r...2023-05-26

GB/T 19418-2003鋼的弧焊接頭缺陷質(zhì)量分級指南Arc-welded joints in steel—Guidance on quality levels for impe...2022-06-08

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