KS B ISO 9689:2016 Raw optical glass-Resistance to attack by aqueous alkaline phosphate- containing detergent solutions at 50 ℃-Testing and classification
2023KS B ISO 9689-2023 Raw optical glass — Resistance to attack by aqueous alkaline phosphate-containing detergent solutions at 50 ℃ — Testing and classification
0000 KS B ISO 9689-2016(2021)
2016KS B ISO 9689:2016 Raw optical glass-Resistance to attack by aqueous alkaline phosphate- containing detergent solutions at 50 ℃-Testing and classification
2006KS B ISO 9689:2006 Raw optical glass-Resistance to attack by aqueous alkaline phosphate- containing detergent solutions at 50 ℃-Testing and classification