KS L ISO 22197-4:2020 Fine ceramics(advanced ceramics, advanced technical ceramics) —Test method for air-purification performance of semiconducting photocatalytic materials — Part 4: Removal of formaldehyde
2020KS L ISO 22197-4:2020 Fine ceramics(advanced ceramics, advanced technical ceramics) —Test method for air-purification performance of semiconducting photocatalytic materials — Part 4: Removal of formaldehyde