GB/T 15972.40-2024 Chinese PDF (GB /T15972.40-2024) GB/T 12789.1-2025 raw natural and raw synthetic

raw natural and raw synthetic - Sampling and further preparative procedures (Chinese: 天然、合成生胶 取样及其制样方法)

1-dichloroethane (Chinese: 食品安全国家标准 食品接触材料及制品 氯乙烯、1

English versions: GB/T 11842-2025

GB/T 13815

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)

GB/T 15972.40-2024 Chinese PDF (GB /T15972.40-2024) GB/T 12789.1-2025 raw natural and raw syntheticGB T 15972. 40 2024_Chinese: Specifications for optical fibre test methods Part 40: Measurement methods and test procedures for transmission characteristics Attenuation (Chinese: 40 ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 15972. 40 2024