Pay in 4 interest-free payments of $14.75 Learn more
Ships within 48 hours · Estimated delivery Aug 31 - Sep 5
GB/T 19973
English versions: GB 17918-2025
English versions: GB/T 1480-2025
3-2025_Chinese: Uncut finished spectacle lenses - Part 3: Transmittance test methods (Chinese: 眼镜镜片 第3部分：透射比试验方法)
English versions: GB/T 18282
GB/T 20972.2-2025 Chinese PDF (GB /T20972.2-2025) GB/T 23500-2025 GB/T 19973GB T 20972. 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, and the use of cast irons (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 20972. 2 2025
