GB/T 19830-2023 Chinese PDF (GB/T19830-2023) GB/T 45523.2-2025 hardness and iron - Spectrophotometric

hardness and iron - Spectrophotometric detection by discrete analysis systems (Chinese: 锅炉用水和冷却水分析方法 磷酸盐、氯化物、硅酸盐、总碱度、酚酞碱度、硬度和铁的测定 基于间断分析系统的分光光度法)

GB/T 45450-2025_Chinese: Revert materials for superalloy - Terminology and classification (Chinese: 再生高温合金原料 术语和分类)

GB 44023-2024_Chinese: Compounded rubber hose for internal use in gas appliance connection (Chinese: 燃气用具连接内用橡胶复合软管)

English versions: GB/T 45445-2025

2-2024_Chinese: Sterilization of health care products - Biological indicators - Part 2: Biological indicators for ethylene oxide sterilization processes (Chinese: 医疗保健产品灭菌 生物指示物 第2部分：环氧乙烷灭菌用生物指示物)

GB/T 19830-2023 Chinese PDF (GB/T19830-2023) GB/T 45523.2-2025 hardness and iron - SpectrophotometricGB T 19830 2023_Chinese: Petroleum and natural gas industries Steel pipes for use as casing or tubing for wells (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 19830 2023