GB/T 31960.13-2024 Chinese PDF (GB/T31960.13-2024) GB/T 32440.2-2024 GB/T 14949

GB/T 14949

GB/T 31036-2025_Chinese: Proton exchange membrane fuel cell backup power system - Safety (Chinese: 质子交换膜燃料电池备用电源系统 安全)

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)

English versions: GB/T 44883-2024

English versions: GB/T 21270-2025

GB/T 31960.13-2024 Chinese PDF (GB/T31960.13-2024) GB/T 32440.2-2024 GB/T 14949GB T 31960. 13 2024_Chinese: Technical specification of power energy efficiency monitoring system Part 13: Field handheld device specifications (Chinese: 13) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 31960. 13 2024