GB/T 2820.9-2024 Chinese PDF (GB/T2820.9-2024) GB/T 44985.3-2024 GB/T 28199-2025_Chinese: Oil-filled radiator (Chinese:

GB/T 28199-2025_Chinese: Oil-filled radiator (Chinese: 电热油汀)

control and laboratory use - Part 5: Particular requirements for laboratory centrifuges (Chinese: 测量、控制和实验室用电气设备的安全要求 第5部分：实验室用离心机的特殊要求)

GB/T 22107-2025_Chinese: Pneumatic fluid power - Directional control valves - Measurement of shifting time (Chinese: 气动 方向控制阀 切换时间的测量)

GB/T 45271-2025_Chinese: Man-made fiber - Determination of catechins content - High performance liquid chromatography (Chinese: 化学纤维 儿茶素含量的测定 高效液相色谱法)

English versions: GB/T 44808

GB/T 2820.9-2024 Chinese PDF (GB/T2820.9-2024) GB/T 44985.3-2024 GB/T 28199-2025_Chinese: Oil-filled radiator (Chinese:GB T 2820. 9 2024_Chinese: Reciprocating internal combustion engine driven alternating current generating sets Part 9: Measurement and evaluation of mechanical vibrations (Chinese: 9) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 2820. 9 2024