GB/T 45650-2025 Chinese PDF (GB /T45650-2025) GB/T 21499-2024 setting time and soundness of

setting time and soundness of the Portland cement (Chinese: 水泥标准稠度用水量、凝结时间与安定性检验方法)

GB/T 45134-2025_Chinese: Petroleum drilling and production equipment - Near-bit geosteering drilling systems (Chinese: 石油天然气钻采设备 近钻头地质导向钻井系统)

GB/T 1346-2024_Chinese: Test methods for water requirement of standard consistency

English versions: GB/T 45219-2025

GB/T 45650-2025 Chinese PDF (GB /T45650-2025) GB/T 21499-2024 setting time and soundness ofGB T 45650 2025_Chinese: Air source heat pump packages with carbon dioxide as refrigerants (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 45650 2025