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English versions: GB/T 15971-2023
GB/T 45178-2024_Chinese: Man-made fibre - Determination of antioxidant activity - DPPH and ABTS methods (Chinese: 化学纤维 抗氧化活性测定 DPPH和ABTS法)
GB/T 1464-2024_Chinese: Test method for density of sandwich construction or cores (Chinese: 夹层结构或芯子密度试验方法)
English versions: GB/T 17817-2024
English versions: GB/T 45157-2024
GB/T 28886-2023 Chinese PDF (GB/T28886-2023) GB 30251-2024 English versions: GB/T 15971-2023GB T 28886 2023_Chinese: Plastic windows and doors for buildings (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 28886 2023
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