GB/T 15340-2025 Chinese PDF (GB /T15340-2025) GB 5009.31-2025 English versions: GB/T 12690

English versions: GB/T 12690

1-2025_Chinese: Uncut finished spectacle lenses - Part 1: Single-vision and multifocal (Chinese: 眼镜镜片 第1部分：单焦和多焦)

24-2025_Chinese: Methods for chemical analysis of magnesium and magnesium alloys - Part 24: Determination of trace impurity elements contents - Glow discharge mass spectrometry (Chinese: 镁及镁合金化学分析方法 第24部分：痕量杂质元素的测定 辉光放电质谱法)

English versions: GB 35181-2025

GB/T 15340-2025 Chinese PDF (GB /T15340-2025) GB 5009.31-2025 English versions: GB/T 12690GB T 15340 2025_Chinese: Rubber, raw natural and raw synthetic Sampling and further preparative procedures (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 15340 2025