GB/T 4340.2-2025 Chinese PDF (GB /T4340.2-2025) GB/T 18216.12-2025 GB/T 44911-2024_Chinese: Aircraft equipment -

GB/T 44911-2024_Chinese: Aircraft equipment - Environmental and operating conditions for airborne equipment - Humidity

GB/T 29631-2025_Chinese: Flexible and torsion resistant cables of rated voltages up to and including 1

2-2025_Chinese: Assembled spectacles - Part 2: Power-variation prescription assembled spectacles (Chinese: 配装眼镜 第2部分：渐变焦定配眼镜)

English versions: GB/T 37027-2025

1 encoding rules - Part 1: Specification of Basic Encoding Rules(BER)

GB/T 4340.2-2025 Chinese PDF (GB /T4340.2-2025) GB/T 18216.12-2025 GB/T 44911-2024_Chinese: Aircraft equipment -GB T 4340. 2 2025_Chinese: Metallic materials Vickers hardness test Part 2: Verification and calibration of testing machines (Chinese: 2) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 4340. 2 2025