The optical film has a high retardation value, the transparency and the moisture permeabilityresistance.
该光学膜具有高延迟值、透明性和耐透湿性。
2
Increasing the compaction degree and preventing the cracks in concrete from occurring are the fundamental measures to improve the permeabilityresistance of concrete.
增加混凝土的密实度和防止混凝土开裂，是提高混凝土抗渗性能的根本措施。
3
Results indicated that the compound expansion agent almost hasn't effect both on setting and frost resistance of crushed stone mortar, but can enhance its permeabilityresistance ability.