GB/T 21836-2024 Chinese PDF (GB/T21836-2024) GB/T 45088-2024 English versions: GB/T 45511-2025

English versions: GB/T 45511-2025

1-2024_Chinese: Metallic materials - Knoop hardness test - Part 1: Test method (Chinese: 金属材料 努氏硬度试验 第1部分: 试验方法)

1-2024_Chinese: Multimode optical fibres for telecommunication - Part 1: Sectional specification for category A1 multimode fibres (Chinese: 通信用多模光纤 第1部分：A1类多模光纤特性)

31-2025_Chinese: National food safety standard - Determination of p-hydroxybenzoic acid esters in foods (Chinese: 食品安全国家标准 食品中对羟基苯甲酸酯类化合物的测定)

GB/T 44958-2024_Chinese: Management specification for safety of chemical plant equipment (Chinese: 化工设备安全管理规范)

GB/T 21836-2024 Chinese PDF (GB/T21836-2024) GB/T 45088-2024 English versions: GB/T 45511-2025GB T 21836 2024_Chinese: Manganous manganic oxide (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 21836 2024