JIS R1751-4-2013 精细陶瓷（高级陶瓷、高技术陶瓷）--室内光环境下光催化材料空气净化性能的试验方法--第4部分：甲醛的去除
Fine ceramics (advanced ceramics, advanced technical ceramics) -- Test method for
air purification performance of photocatalytic materials under indoor lighting
environment -- Part 4: r='red'>Removal of formaldehyde
