GB/T 15231-2023 Chinese PDF (GB/T15231-2023) GB 5009.31-2025 GB/T 27793-2024_Chinese: Beater addition non-asbestos

GB/T 27793-2024_Chinese: Beater addition non-asbestos sealing materials (Chinese: 抄取法无石棉纤维垫片材料)

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

GB 12358-2024_Chinese: Gas detection and alarm instruments for workplace - General technical requirements (Chinese: 作业场所环境气体检测报警仪器 通用技术要求)

GB/T 12940-2023_Chinese: Technical specification for silver-graphite electrical contacts (Chinese: 银石墨电触头技术条件)

GB/T 13929-2024_Chinese: Water ring vacuum pumps and compressors - Testing method (Chinese: 水环真空泵和水环压缩机 试验方法)

GB/T 15231-2023 Chinese PDF (GB/T15231-2023) GB 5009.31-2025 GB/T 27793-2024_Chinese: Beater addition non-asbestosGB T 15231 2023_Chinese: Test methods for the properties of glassfibre reinforced cement (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 15231 2023