GB/T 7143-2025 Chinese PDF (GB /T7143-2025) GB/T 43018.4-2025 English versions: GB/T 6822-2024

English versions: GB/T 6822-2024

English versions: GB/T 45539-2025

under load (Chinese: 土工合成材料 负荷作用下垂直渗透性能的测定)

2-2025_Chinese: Nanotechnology - Nanogenerator - Part 2: Test methods for electric performance of triboelectric nanogenerators (Chinese: 纳米技术 纳米发电机 第2部分：摩擦纳米发电机电性能测试方法)

6-2025_Chinese: Lightning protection system components(LPSC) - Part 6: Requirements for lightning strike counters(LSCs) (Chinese: 雷电防护系统部件（LPSC） 第6部分：雷击计数器（LSCs）的要求)

GB/T 7143-2025 Chinese PDF (GB /T7143-2025) GB/T 43018.4-2025 English versions: GB/T 6822-2024GB T 7143 2025_Chinese: Methods for chemical analysis of silica sand for foundry (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 7143 2025