GB/T 23781-2024 Chinese PDF (GB/T23781-2024) GB/T 45472-2025 GB/T 45650-2025_Chinese: Air source heat

GB/T 45650-2025_Chinese: Air source heat pump packages with carbon dioxide as refrigerants (Chinese: 二氧化碳空气源热泵机组)

GB/T 25433-2024_Chinese: Safety requirements for rubber and plastics internal mixers (Chinese: 密闭式炼胶机炼塑机安全要求)

English versions: GB/T 20603-2023

2-2025_Chinese: Optics and photonics - Specifications for telescopic sights - Part 2: High-performance instruments (Chinese: 光学和光子学 瞄准望远镜规范 第 2 部分：高性能仪器)

including power brush

GB/T 23781-2024 Chinese PDF (GB/T23781-2024) GB/T 45472-2025 GB/T 45650-2025_Chinese: Air source heatGB T 23781 2024_Chinese: General quality of black sesame paste (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 23781 2024