The effect of waterproof will be so excellent if we glue PE film or other waterprooffilm on the surface.
如在其表面复上PE或其它防潮膜，防潮效果极佳。
2
Antitranspirants may work by depositing a waterprooffilm over the stomata or by inducing stomatal closure.
抗蒸腾剂可以通过沉积气孔上的防水膜或诱导气孔关闭起作用。
3
The cover is formed by covering an airtight waterprooffilm on a frame. The lower edge of the cover is provided with a sealing ring which can prevent the external leakage of hot gas.