GB 20052-2024 Chinese PDF GB/T 45471-2025 2-2025_Chinese: Optics and photonics -
$34.95
Description
2-2025_Chinese: Optics and photonics - Test methods for telescopic systems - Part 2: Binoculars (Chinese: 光学和光子学 望远镜系统试验方法 第2部分：双筒望远镜)
headed (Chinese: 成型模 带头导套和带头定位导套)
English versions: GB/T 45276-2025
2-2025_Chinese: Petroleum and natural gas industries - Materials for use in H2S-containing environments in oil and gas production - Part 2: Cracking-resistant carbon and low alloy steels
GB 20052-2024 Chinese PDF GB/T 45471-2025 2-2025_Chinese: Optics and photonics -GB 20052 2024_Chinese: Minimum allowable values of energy efficiency and the energy efficiency grades for power transformers (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB 20052 2024
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