Hydrophobic coatings seal lens surfaces with an ultra-smooth polymer, making it easy to clean the eyeglass lenses from dirt, water or oily contamination can simply be wiped off.
加硬防水膜在镜片表面封上一层非常致密平滑的聚合物，使得镜片表面灰尘、水及油污清洁异常方便。
2
What is to be done?As long as you press chewed gum on the surface of the seal flatly, it can clear dirt thoroughly and keep seal clean.
这时只要将嚼过的口香糖，平整压贴粘于章面上，就能彻底粘起赃污，维持图章面的清洁。
3
Open the smoke chamber of boiler; check the seal patch and smoke dirt to decide if it needs to clean up or replacement.